Chis Pine's is not the only star on the rise. ZOE S. seems to be everywhere these days!
Personally I would welcome her having a HUGE role in the next movie...even if McCoy has to take a back seat (sorry but Bones was ALWAYS my least favorite of the seven main characters).
Abrams is a smart guy right? If he doesn't capitalize on ZOE as UHURA that would seem to be a missed opportunity.