Ability to set default controller profile. It's annoying to have to constantly select a profile before starting a different mode. I'm the only one playing on my Wii U online so I think it should default to one.
This I wouldn't mind. I dislike the default shoulder button setup for the Pro controller, so I made a profile to fix it. I'd like to keep my profile set to it so I won't have to change it each time I use my Pro controller.
Allow voice chat in game with friends. They're my friends, at least let us talk online together if we want.
You can do this in lobbies I believe.
Connection strength icon on players in the lobby menu. Additionally I'd like it if we can set our region and only play against people nearest to our location.
I was first exposed to this in MvC3. This was a neat feature. If it helps out with connection issues (which I don't get many of) then I'm down for this.
Turn off stage hazards. I wouldn't mind playing on some stages in their normal state but just without any hazards that can kill you(Like the yellow devil for example.)
Eh, I think it's fine the way it is. Nintendo knew folks loved Final Destination since there's nothing in it, so having Omega forms of stages is perfect. Also, if you want to play a non FD/Omega stage that has platforms, there's always maps like Battlefield and Smash Town.
Another for glory mode that lets you play 1v1 but with equipment enabled.
This would be neat, but I think there aren't going to be any more new modes.