I know it sounds like a silly question, but I'm rolling as a bomber/gunner right now, so I tend to be further away from the mobs and only run in to CC them with my bomb. Naturally, it means I have much less chance of grabbing crowns as mobs die and drop them. I also don't like to run up, shoot all the treasure box and collect everything by myself. It just seems...selfish.
Do you get a share, etc, at the end of the map?
Every single crowns and heats that drop is shared for all the party (for example, if 1 crown drop, each member of the team receive 1 crown, to not favor people going solo).
To answer the actual question : apart from the wheel, no, you don't receive additional rewards at the end of the map (I mean at the elevator. Certain maps, including boss levels, have some box and minerals at the end to reward you).