Roddy might have a mistake from time to time, but Barea and JET both have silly mistakes as well. Difference is, Roddy is considerably more gifted and talented than either of these guys.
I think its more than worth the risk of dealing with youthful mistakes at times. When he loses a game for the team, then there will be a legit reason for Ricky C to be hesistant to play him. On the other hand, JET has lost and still loses countless games for the Mavs in his time here, but somehow he still gets stuck with.