Hypothetically speaking, if I were to design an Evil Dead game it would have:
1) Deadite toys that springs out of a grave Sam Raimi style and has limbs and head you can blow off (they hide behind body) Oh and a little hidden fan to blow the hair around for no reason, again like a Raimi film.
2) Deep satisfying shot at the back with a mechanized trap door leading to a lower PF basement. Combo loops in basement to rev up chainsaw jackpot which you collect on main PF during MB. Trap door could sync to speech to taunt you during play.
3) "Broken Bridge Jump" shooter lane habitrail, with the ability to use the gap to load a ball back into shooter lane for Double Barrel Ball Launch.
4) A Newton ball lock so you hit the shot to release for quick 2 ball MB (friend capture MB save me Ash!)
5) Small tape recorder toy near flippers that rotates reels and lights up when mode prompts are being spoken to give you a visual clue to listen up.
6) A scoop eject that's positioned better than the one in AMH.
Yup, would have been cool all right.