I've addressed some of the concerns above: you can now change the button for Quick Attack to Jump, Spin or some other key from the console. It won't automatically change your character's ability though, so make sure you have some way to do that.
Also, I originally locked the timing of the move for balance reasons, but now you can change that -- use the new cvars I've put in, along with qa_cheat, to customize the Quick Attack more precisely and create that overpowered instant-across-the-map teleport you've always wanted.