Everything about this season needs to be take into context with this tanking situation. Brice (and every other young player) has been afforded a level of freedom and responsibility that is probably more than what they would get in a real, winning situation. It's pretty obvious that Brice is often doing too much, but it doesn't mean he has to be in this role his whole career. Brice will either improve his decision making at the current level of responsibility he has or he will scale back into a role that requires less decision making. I think both paths land on him being a player in this league and he doesn't really strike me as a selfish player who requires the higher level of responsibility and larger role.
It is more than reasonable to think that a 21 year old can improve his decision making and IQ over time, so I'm excited to see how his development goes.