If I'm not mistaken, Pau was a free agent. Knowing that and that they weren't going to be able to re-sign him (I can only assume), it's not that lopsided. Marc and a couple of 1sts (and Javaris) for a guy who wasn't going to be around in a few months anyway is quite a bit in fact imo.
He wasn't a free agent. Memphis was just dumping his salary and was requiring only draft picks and expiring contracts in return.