I felt that way about Killzone 2.
I loved the game, but the controls were sluggish and it felt like you were always fighting them. Killzone 2 could have been PS3's HALO.
Following your K.I.S.S principle ... who else thinks all FPS should use the same button configurations?
The amount of times I have been playing a game like Rainbow 6, than get invited to game like CoD MW, only to throw a grenade at myself or a team mate because the buttons are different ...