Different Key Setting For Different Champions
Just like what the title says. Riot should allow user to save different key binding configuration based on which champion that they play.
Each Champion must have each key binding setting.(Unless user doesn't want it of course). or Riot at least make some kind of 'default binding' for all user and different setting can choose which champion be applied.
I have one more opinion(which i highly doubt it won't even get considered....but)
I think it is not that bad idea for giving a try for user to play League of Legend with Keyboard Arrow Key(While STILL KEEPING current control system). Character will try to move/attack based on keyboard, and only will use mouse when they need to non-target skill. Just like World of Warcraft.