Do folks really believe that Powell will not get through waivers? Because that would have to be the bet for Ainge to waive Faverani and his contract which includes a non-guaranteed 2.2 million for 2015/2016, while keeping Powell on the roster for almost a third of the trade value financially.
Even if Danny prefers to keep Powell over Fav, on the basis of basketball value alone (and I am not convinced of this), if he can get Powell through waivers he should be able to sign him to a Red Claws contract, allowing a call up later in the year.