I think MP3:C's controls are nearly perfect. I only have two complaints:
1) Pressing Analog Down + Z quickly should trigger a 180º turn like it does in RE4. It wouldn't have interfered with MP3's existing controls either.
2) The pointer has a problem on my system when I aim at the top of the screen, and I have no such problem on the main Wii menu.
No matter what happens I think the most important thing would be for FPS games to have consistent controls between...