Firstly the game does need to be taken back to its roots, back to what scared the crap out of me at am on a cold dark night back in 1999. So here goes.
Lets go back to what made Resident Evil, the game we all remember lets go back to Raccoon City, set the game between the events of the Mansion from RE and before they blow it to high hell in RE: Nemesis. But lets go big lets make it open world, let players explore the WHOLE of Raccoon City as they fit, I mean think about it, theres always been rooms and buildings players wanted to explore, I know back alleys and allotments always intrigued me but the damn edge of map got in the way and stopped me nosing around!
Think about it, that block of flats a house could be hoarding a decent ammo stash, but then again there could be dozens upon dozens of undead waiting to ambush me, (Or a super breed packing a damn chainsaw I also know they arent Zombies, beside the point Im trying to make). I could be clearing out room by room but are they dead? I punched a full clip into that big zombie only for him to ambush me as I walk back along the corridor to head up to the next level.
Adding to this you see something skitter over the busted floorboards above is it a dog? We all remember our first encounter? Maybe worse still its a licker creeping, stalking waiting for you or worse yet those darn hunters waiting to bite you in half. Either way you have to go up if you want that ammo? Who knows maybe Nemesis is waiting for you?
But you see the horror is not only going up but coming back as well (as mentioned just because they look dead, doesnt mean they are), unless you fancy jumping off the roof? Open world would add a lot more to the game, there could be a story of the survivors banding together creating random moments of co-op, or Claire and Leon teaming up to escape again, the idea is endless with the characters over all the series.
Stick the crack team trying to end you into the mix (aka Agent mode from RE: 6) and youve got a whole new level of game play. Allotments, houses, blocks of flats, the police station, the hospital we all enjoyed these locations. A broken down bar (Theres one in 3 right?) Even add an element of ferrying survivors to an extraction point for the military to extract them, before they consider Raccoon City a loss at least. The options are endless.
I believe Capcom can learn lessons from their own games, including their Dead Rising Series. If your out of ammunition your not going to scrabble about for ammunition in weapons you dont have, youre going to pick something hard and heavy and bludgeon those dead things to dead. At least before diving into that house over the road with the light on.
Im sure fans have an endless trove of ideas that can be added to this but there it is my idea! Bring back the survival and the horror will bring itself.