Honestly, the ship has sailed at PSA. Compass is still a good bet. Mesa might be filling up too but last time I had a Mesa jumpseater, he told me upgrade is down to 1 year!!! Of course the guys that are upgrading have prior 121 experiences to meet the minimums but still, that's ridiculous!
Here's the advice of the year...
GOTO PIEDMONT!!!!
I'm not joking. PDT is currently in a worst position than PSA when AA threatened PSA. I'm assuming they will take the deal or will probably close shop. If they do get a new fleet, watch how fast things will move there. But grow a thick skin because you will be called the next endeavor or PSA scumbags.