I say bring 'Sheed back! His role this season would be dramatically different than last. Last year he was our first big man off the bench (if not the 1st guy off the bench period) for the entire season, playing alongside a gimpy KG and an injured Big Baby. This year, KG is healthy, we've got Shaq, Perk, from all reports, is looking great, Big Baby has got to be the favorite for 6th Man of the Year, Semih Erden is a promising rookie, and Jermaine O'Neal keeps the bench warm.
I think JO is done. He's coming apart quickly. Scrap JO, bring in 'Sheed. Then have a rotation where Perk/Shaq start at center (backed up by the other), KG starts at PF, obviously, and is backed up by Big Baby. Then, if one of the big men get hurt or find themselves in foul trouble, Sheed is the guy who steps up for them.