As long as he works hard, I'd like him to stick around. He tries so hard when he is going and would make a great example for the young ones. If I had an ideal "high level veteran roll players to have on my team for my young guys to play with that could also fit in if we got good" team, it would look like:
PG: Goran Dragic
SG: Tony Allen
SF: Wallace
PF: Bird Man
C: Varejao
In other words, guys who don't hog the ball on offense, work their butts off on defense (well, except Dragic) and make the other guys around them better. Bonus points if they get injured down the stretch a lot for tanking teams, too.