I wonder if RE6 having too much action is why they went back to horror with 7. Even so, 6 alone is not the worst offender. I think the game to blame is 4. But even still. Nobody ever has the balls to admit that 4 was the actual game that served as the beginning of the end. Or to be kind of more fair with my words, started a new beginning.
While 4 has action too, it retains some horror elements, but I still believe it's overrated. 5 just threw it all out the window.
7 and 8 are just horror games with links to RE canon, and a main character involved to link it together. But even they have sections with Chris knocking over the Molded and planting a bomb on some root. So they are tediously slow, Ethan walking simulators, until Chris comes. Then it's more of the same concept that 4 started.
I think after 4 came out, there was no going back to the basics, and Capcom knows that. This is why the franchise is a mess these days. It's like they don't know who their real fans are anymore. Just doing what they can to cater to too many gamers, as there's people who only like 4 and over, or just 4 by itself. While others like them all, or just the classic ones.
In my opinion, mainline RE games should be survival horror with action type gameplay reserved for spin offs. Even stuff like the Revelations games I think balances out the two just fine. But trying to experiment a lot I believe backfires on Capcom sometimes.
Another thing they should do is replace Leon and Chris and so on with the next generation of soldiers, police officers, doctors and more, instead of unnaturally keeping them alive to essentially milk the tar out of the franchise because they're popular.