We DEFINITELY need a backup 2-guard in case Stephenson does horribly in the preseason/start to the regular season. Sure we could do better than Barbosa, but there aren't many better options left that could be had for cheap. We HAVE to find out whether or not Lance is a good ball player or not, so we need to let him play some. But 82 games is a lot, and if we get a key injury or something we'll need someone who can step in and have the ability to score.
I think if Barbosa is okay with Stephenson starting the preseason/ reg season as the backup 2, then we may as well bring him back. He played HORRIBLE in the playoffs, but its kinda hard being a 6'3 guard who's the only offensive option on the floor (when he would be in the game with the rest of the bench) All teams would have to do is clog the lane and he was pretty much screwed lol.
I do remember game 2 against the Heat he scored a few key baskets that helped us win that game. I think him going from the MAIN offensive option on the floor to being just one of the players out there, would definitely help.
Even if he does sign here, I wouldn't imagine him playing more than 10-15 mpg anyways. If he gets hot, great. If not, back to the bench he goes.