1) I'd really, REALLY love an option to always display teammates' names when delving. Either that or colored arrows pointing to them. In arenas and danger rooms, sometimes I get mecha-knights confused with similarly-colored PCs in the heat of battle...

2) Please make it possible to bring up the Gate Map with a hotkey! That way you could bring it up without unlocking the HUD.

3) It'd be nice to have some sort of minigame (RPS? A quick spar?) to bring up while waiting for levels to cycle or for making decisions.

4) What if, when you brought a surviving friendly mecha-knight to the end of a level, you could use its remaining health to drop the elevator cost a bit? Not a huge amount, maybe 2 or 3 at most. It would make mecha-knight kits a bit more useful on arenas. :P

5) This one is more of a minor suggestion because I know it will probably get shot down anyway, but... the topic of Character Level has been brought up before, and I think it would be neat if you could level up. Instead of boosting your stats, though, each level (starting at 0 I guess, to make it work better) would give you 1 more max mist energy.