I don't see him starting next season if PP and KG return... unless that means we are going super big and AB is traded or benched. He was going to get the nod as a starter only b/c Doc didn't think Green was ready for it.
If Sully starts, our lineup would be
RR
PP
Green
Sully
KG
I don't see that working defensively.
Let's see the Mia mathup for one
RR vs. Chalmers/LeBron
PP vs. Wade/Lebron
Green vs. Lebron/Wade
Sully vs. Battier/Haslem/LeBron
KG vs. Bosh
I think you need another quick guy out there, like Bass or AB. Mia can cause so many matchup problems against those 5. With AB starting he can handle Wade more of one on one and he can also take on Chalmers if need be. Bass can guard Battier and Haslem who play outside the paint (personally I'd have Battier starting in this situation if I were Mia).
There is no hope for them stopping playoff RR so all they would have to do is contain the rest of the guys... and the other 4 guys not on RR a equipped to switch on any of our other guys and are good one on one defenders. It will also hurt the little rebounding we do already. Our best rebounders are KG, RR, and Sully (PP) and they won't be anywhere near the paint to get them.
Bosh can defend KG, Green, or Sully, LeBroid can handle 1-5, Battier can handle 3 or more of our guys one on one, Wade can stay with PP, Chalmers can't handle RR but he isn't a bad help defender. They are a great help defending team. Miami could pack the paint and force us to shoot jumpers and as you can see, that hasn't worked in our favor for seasons now.