Did anybody here watch the Celtics last year?
Perk was our only option down low (neither KG nor Sheed posted up consistently) and he thought he could score for the majority of the season; Perk did have a high fg%, but that was in part because he committed a LOT of turnovers when he got the ball in the post (never got a chance to make a field goal attempt). One of the Celtics' biggest weaknesses last year was that one of their least talented offensive players was their primary post option.
How could Jermaine O'Neal be worse than that? Jermaine can't score 20 ppg anymore but he's still been averaging around 14 ppg, a number Perk could probably never reach with any efficiency. Jermaine can also hit a mid-range jumpshot, something Perk certainly can't do.
I really don't buy this "Jermaine will make our offense worse" argument. If the guy he's replacing were an effective offensive player, I would agree. But he's not. Jermaine is actually an upgrade offensively. I get what Who is saying - that Jermaine is no longer any good at creating his own offense, though he's still a more than adequate garbage finisher. Hmm, who does that sound like? Perkins is just as bad at creating his offense, if not worse. The biggest question marks for O'Neal are not his ability to create offense, but rather his health and his defensive ability.
If he's dealing with injuries for part or most of the season, then forget about it...we all saw in the playoffs how awful Jermaine can be when he plays hurt. On the other hand, Perk played hurt for the second half of the season and he wasn't very good, either.
So in summary, our offense will be just fine with Jermaine starting. As long as he's healthy, at worst he's about the same as Perk only with a mid-range jumpshot. That actually sounds pretty good to me.