Thanks! The jump behavior is something we've heard from a few people and we're definitely changing it.
Regarding switching between characters it's a little harder because you can possess a new one with Shift or release it to go back to the previous one with Q, I'm trying now to see if E for possessing a new one and Q to release makes more sense, since it makes it more clear that you "Go forward" with E and Q to go back to a previous character.
Anyway, thanks for the feedback!
I'd love to try your game, I'll check it out later today as I'm at work right now!