One thing I think everyone loved about the last game was how everyone was moving and reacting on offense. And that was largely because Quickley was attacking - and well, there's no pro scouting report on him yet. He's skilled and confident enough to dribble in and back his way out if he doesn't see anything. I don't know if you "blame" it on the coach, Randle, or Payton... but when all else fails, play conservative, get the ball in the post, and let the big man go to work.
I think Quickley will get an extended look - he may have overtaken DSJ and perhaps Frank on the minutes chart... and probably will get minutes at SG with RJ shifting to SF. I do wonder if he'll struggle *this season* from 3pt range. Opposing teams may respect him too much based on his 92% FT and stay home on him from 3pt range. He just seems much more active WITH and WITHOUT the ball than those two.
As far as who will be in the rotation come the regular season, I see these 10 players:
Noel/Mitch
Randle/Obi
RJ/Knox
Burks/Frank
Payton/Quickley
Burks is a stabilizing presence with the starting lineup and gives them decent size and shooting. He MAY just be a 15-25/mpg player on this team - he's ultimately set up as trade bait and be the "pro's pro" on a young team, being a good influence, mentor the young guys. If the young guys are doing well, they'll take his minutes.
Noel is basically interchangeable with Robinson - he's a little better in some areas, has less impact in others... but you'll get solid output from either.
Unfortunately, I don't see Iggy cracking this rotation. He'd probably have at least as much impact as Bullock (I'd venture to say more on offense, probably less on D.). Alas, his best position is probably SF, but he's blocked there by a number of other young players that need PT.