Hello !
1. I've been playing the game for hours and the thing that I quickly notice is the time that spawn take. So I thought that instead of using the mini cutscene in the hangar we could spawn directly in the arena behind the big screen (poorly edited picture below) and the respawn scene would just be the robots soldering the arm to our body then let us fall on the elevator.
In endless we don't need to know the name or fav colour, the voice should just announce something like "Human Gladiator".
http://image.noelshack.com/fichiers/2016/47/1479929460-spawn.png
2. A sword can be swung but also used to stab. The sword have use only the left click right now but we start the game with an energy bar so why not add a stab move with the right click that use this energy and that would add different patern for the battle moves. Also this abilty would be upgradable with a brief dash forward while stabbing.
3. And finally it really bother that we can't jump while the jetpack is active it would be nice if the jetpack ability tree had a second way to unlock the jump.
Thank you for reading I hope my english wasn't too bad !
Sorry the mass editing i've got issues with the picture link