I don't think BBD is very good, so I guess I'm not concerned losing him from the rotation. You'd end up seeing more small ball with Pierce at the PF and Powe playing more, both good things IMO.
I disagree about Ainge being unwilling to make a lateral trade that improves the future. The problem with what I proposed is that Scal is actually the backup SF at this point too, so you'd be losing two of your top 5.
Assuming they bring in a solid vet Center, BBD is done anyways.