Personally, I believe that a merger with PSA is still coming. The precedent is there with the slow consolidation of every regional US Airways has ever purchased. PSA is making some, albeit, slow progress on their contract. PDT's talks are stalled. My prediction:

As soon as PSA signs off on their new CBA, which will be a cheaper contract then PDT's current one. We will merge. The Dash will slowly be phased out completely. And US Airways will be in a better position to sell off or liquidate it's wholly owned liability under one certificate should such a thing become necessary. This move eliminates any need to negotiate a new contract with the PDT pilot group.