I am going to channel my first post and say that I don't want to draw definitive conclusions from such a lopsided exhibition game. But none of the bigs looked appreciably better yesterday, at least offensively. Like you, I have hope that Coleman will make the sophomore jump, but some of the post moves exhibited by Rak looked really disappointing. Keita is what he is--hopefully he'll continue to sustain the improved level of play that he demonstrated last postseason. But Coleman looks like he might have at least some of the same issues he showed last year [bringing the ball too low, getting blocked, shying away from contact instead of putting his body on someone and initiating it as he goes up, etc.]
The problem is, center is a very important position for our team defensive concept. Rak played better there yesterday defensively than Coleman [again, very limited data set], but was lost on offense. Coleman played a little better offensively than Rak, but wasn't noticable defensively, in part because he got into early foul trouble.
I'm excited to see what Roberson can do, but I'm pretty well convinced that CJ / Grant will get the majority of PT at the forward positions -- and rightly so. Not sure that Grant / Roberson could handle the defensive responsibilities we require from center to run an effective zone [similar to why we couldn't really play Grant there last year for any appreciable length of time]. At approximately 200 pounds, I can't see Roberson being able to man the pivot this season, playing alongside those other two forwards. I know he's supposed to be a good rebounder, but...
I view it as us really having three centers [Coleman, Rak, Keita], even though Rak might get a token start at the 4.
Also having three forwards [CJ, Grant, Roberson], all of whom are going to play.
Three guards [Ennis, Gbinije, Cooney, with Buss maybe getting some token time], and there's your 9 /10 player rotation.