I'd rather keep our late first round draft pick and either trade it for a young stud or gamble on a high upside guy.
It's frustrating to watch the weaknesses that the Celtics have and know that we have the resources to sure up that weakness. But I have two reasons why we shouldn't do anything:
1) Unless it's for another legit scoring forward-center, it does not significantly make us better. It might make our weaknesses less obvious, but does that vault us to the next level of contention? No. In that sense, any move like that would be a pacifier meant to sooth the fan-base. We are more mature than that.
2) Rebounding is about defensive rotations and effort. Both have been poor for us this year. Getting a rebounder would act like a crutch to this team. If Avery Bradley has proven anything, it's that we can rebound better than we are. Crowder, Horford, Olynyk, Brown, Smart, Jerebko, Johnson, and even Thomas have got to put more effort in.
For whatever reason, my eye is mostly on Crowder for this. He averages a respectable 5-6 rebounds a game, but I seriously think he could get more.