If you were turning it into RE, you could definitely make the mechanics clunkier and more brutal without it becoming a situation where it no longer makes any sense, removing stealth would be a little silly, there's no real reason to do that, you could keep that in because while most regular enemies wouldn't REALLY require it, situations and certain boss battles would, a character like Leon with Police training and so on should be utilizing tactics like that anyway when dealing with a faster/stronger enemy.