well he's a better driver which simply opens up more passing opportunities. i still think for now you bring Harper off the bench until he proves it in NBA action.
i said it elsewhere but i like the idea of starting Fox for his 36 minutes, have Harper play (for now) about 25 minutes (all 12 of the non-fox minutes, assuming the game is competitive), and about 12-13 minutes alongside Fox. you have Castle starting and playing about 30 minutes, never as the sole lead guard. whatever leftover minutes would feature lineups with champ/vassell sliding down to the 2
whatever we do, whoever we start, however many minutes these guys earn, i think we absolutely should have one of Fox or Harper on the floor for 100% of the competitive minutes, much like we should do with wemby/kornet at center. if they can share time, great. but whether or not they can, it should not come at the expense of having one on the floor at all times