I personally think Resident Evil should keep the over-the-shoulder perspective than going back to fixed camera angles. I barely ever like fixed camera angles in games because in a lot of my experiences with games with fixed camera angles I've always had a problem with either the controls, the environment, and the gameplay. The controls was always the naggiest woman in the room because I always have this thought process with games with fixed camera angles that "I need to move in coordination of the camera", not "I need to move in coordination of the character". It is tough to describe it without a visual representation. As for the environment, everytime I play a game that has fixed camera angles there is always something in the environment that I will have a hard time telling what it is and rather or not I can interact with it, either due to my poor eyesight or because the camera is in such a position that the thing I'm looking at is not what it seems to be in my eyes and sometimes due to the placement of the thing I'm looking at. And then there is the gameplay, if the fixed camera angles makes it too much of a pain to deal with then my level of enjoyment from the gameplay side is going to decrease and if it is just really bad then it'll decrease to the point where I'll turn it off and add the game on my s**t list.
I think the best route in terms of newer Resident Evil's and adding in both camera angles is to either A) go one camera route and add in the 2nd camera as an unlockable or B) make it a pre-game option and put in either the options menus, before the game starts and ask you "Which camera do you want?", or as part of a difficulty option like in Classic difficulty that makes the cameras fixed and takes away your HUD completely, either way you'll get the best of both worlds. They should not however put fixed camera angles in stupid places and absolutely waste it, like what they did for the Lost in Nightmares DLC for RE5 by making it an easter egg and then immediately taking it away once you're out of the mansion section which was the least, and for lack of a better term, "scary" place in that entire DLC (I would say it would benefit the most in the sewer section of that DLC, but that's not saying much, at least for me.).
As for a FPS Resident Evil, I would say "Yes, please" and "Thank you" if they decide to keep making Resident Evil games with movement in 3rd person and shooting in 1st person like with what they did for Dead Aim and Revelations on the 3DS, or go the Fatal Frame/Project Zero/Zero route (And possibly DreadOut, I don't know I have not played it yet) where you have to keep a steady aim, patience, and good timing in order to be the most effective and each major enemy has a different attack that you can exploit for a critical attack and each major enemy are fought differently (Would that work for a Resident Evil? I don't know. RE has guns while Fatal Frame has cameras, and RE deals with biohazards and creatures while Fatal Frame deals with the supernatural and ghosts.). Now a full fledge FPS, maybe, I'm sketchy of a full fledged one because of the survivor games.