I have a suspicion that we may be underestimating Miranda's influence.
Despite the madness, the Bakers were Christians, so the talismans and altars don't seem to be characteristic of them. These things may well be Eveline's occult traits, which she acquired from Eastern Europe.
According to Resident Evil 7 and Kaitai Shinsho, Eveline is the completed weapon form and the final stage of the project. During her creation, national organizations jumped at the concept, as they saw the great potential of the fungal girl on the battlefield. More specifically, the game mentions two national organizations: **** and ***. Knowing the chronology and the fact that Resident Evil 7 is Kōshi Nakanishi's game, we can easily assume that these organizations were the BSAA and the FBC.
In the noughties, the BSAA was an organization whose major funder was TRICELL. Even in the days of Resident Evil 5, an additional source in the form of a blog compared it to the UBCS, so it is not surprising that some fans admitted the possibility of the BSAA having a dark side. One of these links could be Albert Wesker himself, since he worked with TRICELL and the HCF at the same time.
If The Connections and the BSAA are indeed connected, then the reasons for the operation to capture the traitor Lucas and send the Winters to Eastern Europe closer to the village do not seem accidental. Such a connection could also be the reason why Chris is acting on his own, since he has always put his principles above loyalty to any organizations. Moreover, the series has always felt like a critique of capitalism, so Chris has had to work for corrupt organizations many times.
I believe that Eveline was created for some true purpose, and the words about the battlefield were a cover, so Lucas criticized Eveline as a biological weapon and, being misdirected, tried to improve the military potential of the fungus. I also believe that this true purpose is a ceremony that is associated with a form of reincarnation, since Eveline's fungus can store genetic information, including consciousness and memory. Since Ethan and Mia have had experience with this fungus, their physiology and Rosemary's may differ in a way that is beneficial to the ceremony. Probably, Rosemary is a full-fledged replacement of Eveline, and Eveline herself planned to escape on a gas carrier, because she wanted to be loved in the family, and not serve as some kind of vessel.
But how can all this be related to Umbrella? You know, I think that the Umbrella symbol is not a symbol of Spencer's organization because of the emphasis on the diagonal sides of the octagon. I can easily believe that in the 20th century there was an association of aristocrats from different parts of Europe who were trying to find the elixir of immortality and of which Spencer was a part, since Lost in Nightmares established that the Spencer Estate was one of the centers of European society.
When Spencer discovered that there was a source of something special in Africa, he could have said nothing to the other families and betrayed them. His complete confidence that his group would find something in Africa seemed to suggest that Spencer had already witnessed something abnormal in nature, which could be the source of a special fungus.
After learning that Spencer had found something somewhere and betrayed them, a Romanian, an Italian, a Frenchman, and a German founded a rival to steal the material from Umbrella, without which Eveline might not have been developed, since her fungus has many traits of a Progenitor virus. For example, Eveline could remotely control the fungus with pheromones, which is a trait of plants and Alexia Ashford. In comparison, Dimitrescu uses a phone to communicate with Miranda, and her mental state doesn't resemble Marguerite Baker, who was obsessed with her queen. This means that Miranda does not have Alexia's traits.
I also have a rather crazy assumption that Dimitrescu and her daughters are Eveline's older sisters, since their names correspond to the order of the alphabet:
Alcina,
Bela,
Cassandra,
Daniela, and
Eveline. Based on this theory, it is quite possible that the founders of The Connections were only Beneviento, Moreau and Heisenberg, so the syndicate symbol has three lines. The Dimitrescu family has been around for centuries, but Alcina herself may be the equivalent of Alexia, if you know what I mean.
By the way, I have absolutely no doubt that Miranda is an Italian from the Beneviento family. Her Venetian mask, title, and pocket Grim Reaper, which is depicted on the map, hint that the developers may have been inspired by Suspiria or Inferno.
At this point, I think it would be really cool to hear progressive rock during a battle with her: