Gameplay changes are welcome, but I really hope they don't try to fundamentally change the core/feel/pace of the game because frankly, I love. I have since the first time I played a NG (reboot) game. What I want from new installments is mainly more gameplay time and content. I want new weapons, new areas, new music (on par with NG1&2), new enemies, new bosses, new playable characters (mainly just Hayate), etc. If the gameplay is basically unchanged but I get all that? I'm thrilled to death.
side note: Health, block, dodge, ninpo and stun system suck in RE. They should use NG1&2 as a base, using NG1's block power (no chip damage, less guard breaks, etc.) with NG2's OTs and fluidity with input moves (not RE's overkill, hop around and be extremely unsafe all the while approach).