Wait until you're handed a transfer request from one of your rotation player who wants more play time ;p
Nice one, I didn't think of this in the first time. If the BBs had implemented this feature in order to reach that point, it'll add - IMHO - a new dimension on BuzzerBeater. This feature should have an impact on the performances of the players. What I mean is that If a GM refuses a transfer request, the player should react negatively and see his rating performances decrease.
Anyways, hope that "roles" won't only be fantasy and that the goal is not only adding colors to the players page...