My GUESS is that Sheens wants to give as much as possible of this game to the real young up & comers more as a reward for hard work. He thinks Taumata is close to his top team (so normally wouldn;t play him) but also realises that with the time Taumata has been out he has to give him as much game experience as possible.
Who knows what goes on in Sheens' mind.
Who knows what goes on in Sheens' mind.