It seems like AA handled this well. Mechanical issues happen. They returned to PHL, got you on another plane, and got you to your destination relatively quickly. The fact you called and the phone CSRs didn't know what was going on is not abnormal, especially given how quickly this all transpired. It seems like PSA got its act together and recovered quickly. When I first opened this thread, I was expecting to see something about AA returning and canceling the flight, offering no hotel rooms, being stuck for 12-24+ hours, having no agent on the ground to assist, etc.

I've had similar situations over my 25 years of business travel. I've never asked for anything on a delay that ended up only being three hours and was dealt with as best as PSA probably could have dealt with it.