One thing I disliked about the whole bio weapons from 7 and 8 is the fact information about them is kind of scratching the surface, while the documents from viral weapons of RE past seem much more well thought and usually easy to understand.
Ironically, this is also the reason why Evil Resident and I love these games, because it's so exciting for us to look for all these keys and connect them together.
I agree that this wasn't really the case in the early games, but I would say that these games didn't give so much information at all. I even have a habit of forgetting how little information these games actually gave, because I often rely on additional material. Like, if you play Resident Evil 2, you will not be able to find out where Lickers came from, so there were many theories in the community, including the new Umbrella project or the participation of the G-Virus. Many people still don't even know the process behind such a mutation, because they may not know that there are fans who have translated additional materials.
So I will say without exaggeration that Resident Evil 7 and Resident Evil Village are the few games in the series that do not require Kaitai Shinsho to understand them. Although I agree that such a fragmentary and epistolary format of storytelling leads to disputes and different interpretations. When I get into such situations, I usually think that the developers really did not plan that such an experience could be kind of a problem for the community, because, as in the case of different scenarios in old and new games, they are calm that some things may be unclear. It's just games and fun, but the fans have created a culture where such things are taken much more seriously.
But pondering the fact that Eveline was deemed a defect (aging too fast without proper treatment) while Miranda did not and while there's not much proof I suspect that happened because Eveline's mutamycete was purposefully weakened and that Miranda wasn't just more than a good DNA match for the mold she most likely had some direct connection to It(was being nourished periodically by the Megamycete), but that is mostly my own assumption.
I personally find it unlikely that there are altruists working in The Connection who just wanted to help the poor mother. Perhaps they used her as an opportunity to create a line of very powerful products, so Eveline was designed to meet the goals of the project. And I definitely see accelerated aging as a useful function, since the treatment makes the girl dependent on her boss, although I still assume that such a defect is a consequence of artificial embryonic development, because for the same reason Eveline's older sisters had bodily defects. After all, they were all divided into categories: from the worst girl to the best.
This is a pretty hot take, but I believe that the Mold is not too demanding in terms of assimilation, so many people had a chance to get immortality, including Spencer. The Bakers are also an example of this, because they were ordinary people from Louisiana without any cool genes or something. And in the same way, Miranda was just a random mother without any knowledge and skills. She used the Black God in the same way that we use a library, that is, as a source of information. Therefore, thanks to it, she discovered the residual consciousnesses of dead people and the genetic information of various life forms. Decades of adaptation have given her the opportunity to learn the skills and control of her own body. In a sense, she is dependent on the Black God, but not in such a way that she cannot objectively live without it. This is the way I see it.
however it does make me curious after all the mutated villagers killed by Ethan and Chris and his team, seemingly making the whole roots of the megamycete expand, the fact is that perhaps the megamycete has some level of consciousness and perceived Miranda was forcing something with Rose's ritual and that's what made Miranda weaker.
The Megamycete was punishing Miranda due to whatever Miranda and the ritual that involved the chalice was about (hopefully we will find more details about it with future dlc, or whenever the continuation of the Chris versus BSAA story gets resumed)
I think the main reason for the growth of the Black God and the loss of Miranda's powers is Ethan.
According to the file of the officer in the stronghold, the statues, the crest with coats of arms in the cave and the Chalice are "prehistoric" legacy left by the founders. Miranda didn't create any of this. She received the residual consciousnesses of dead people and understood how to work with ancient technologies, since such ceremonies could have been carried out centuries earlier. I believe this is all due to the canceled idea of making a parallel storyline in the Middle Ages.
It is difficult to say exactly when the founders came, but I can definitely say that they belong to the Romance language group and are associated with the cultures of Rome and Greece, because they have Italian names, and they also left behind Roman utensils and Greek porticos.
It also makes sense for their names, you know. For example, Dimitrescu is a surname of ancient Greek origin, which means "a follower of Demeter". One of the representatives of these bloodlines was associated with winemaking, so it makes sense why he came to such a name, since Demeter is the goddess of agriculture.
In the same way, Beneviento is a Neopolitan name that translates from Latin as "good wind", and you can see the wind pattern on the crest in the cave. In Italy, there is a legend about witches from Benevento who can become disembodied like the wind and ghosts, which corresponds to the idea of Donna as a ghost.
I think the developers knew that Romanians, Italians, French and so on came from Romance language groups, so they used such references.
Anyway, the founders created the Chalice, the application of which may differ if you install this artifact on different platforms. The altar platform restrained the exponential growth of the Black God, and the ceremonial platform activated an elevator and an ancient bridge that led to an ancient structure, on the site of which a factory was built. Judging by the crystallized remains of the Mold under the stronghold, I can assume that the founders could use the fungus to preserve the sovereignty of the region. You know, if in real history Dracula used different tactics to compensate for the numerical advantage of the Turks, in the Resident Evil universe, the numerical advantage could be compensated by the superpowers that the Mold gave.
When Ethan pulled the Chalice out of the altar platform, a small earthquake started, so at the beginning of the final battle with Miranda, she said that Ethan had awakened the Black God. Miranda also wrote in her diary that the Chalice is the controller of the Black God.
Almost everything Ethan did, Miranda and the lords should have done initially. She divided Rosemary into parts to test her viability, and gave the flasks to the lords, telling them to come back with the flasks later. She had to put the flasks in the Chalice to restore Rosemary, and awaken the Black God to fuse her parts. Ethan did all of this, except for the last part.
If you watch the version of the ending from the leak, you will see that there was no scene in which Miranda lost her power. Nothing implies that the Black God or Rosemary will do this to her. The ceremony works, but the only thing that prevented Miranda from completing it was the appearance of Ethan, who used the toxin against her.
Although the developers have changed this scene, I assume that its meaning remains the same. Ethan prevented the ceremony from ending by using his mental connection with his daughter, which was established because he is the center, since he keeps the essence of Eveline inside him and can communicate with her in the same way that Ethan communicated with Jack in another center. Rosemary is a fungal girl, like Eveline was, so, like Eveline, she has a connection with the center through brain signals. Father and daughter can see each other's memories because they are synchronized.
Miranda ripped out Ethan's heart and infected herself with his fungus through blood to establish a connection with the girl (Eveline's fungus is a special modified strain for such connections), but she underestimated Ethan. He survived, stood up for his daughter and fought without a heart.
Well, this is how I see things after studying the plot.