Personally I wouldn't mind if the Rangers gave up on both Orr and Hossa. Hossa is somewhat useful on the penalty kill--but any offense he ever had has seemed to have disappeared. Putting Dawes on his line and hoping that they'll click seems to me to be kind of a reach at this point. Hall so far has not exactly made much of an impression either. In retrospect it almost seems as if Moore is the much better player--too bad there that Moore was too slight and not very good on faceoffs.
Hossa's effectiveness on the PK is one of the most overblown statements on HF. Third pair PK unit usually going against opposing 2nd line PP units is nothing to write home about.