Is there any reason to even use Melee, or crouching for that matter? If there's an issue I have with the controls, it's that there's something mapped to everything so it's difficult to map everything I want to use where I can most easily use them. I suppose the odd placement of the Wii buttons themselves is to blame for that, as it always feels wierd to use the D-Pad for button commands in Wii games. Right now I have Zoom on Up, ASE on Left, NW on Right, Spin on Down, Rel/Pick on A, Crouch on -, Pause on +, Next Grenade on 1, Score on 2, Jump on C, Lock on Z, and the motion controls set to defaults.
I'm tempted to banish commands I'm never going to use (like crouching or Melee) to buttons I'll never use (like 1 and 2, which are just way too far out of the way) just so I can free up the more useful buttons.