I don't view the Chase lounge as a competition to AA FL since it's over in D where, I'm guessing, they want to capture (in part) the UA crowd in the Chase ecosystem. Even for those AA fliers who have a Chase card that gives access to the lounge, it's a little out of the way unless someone has a lot of extra time and wants to get their steps in for the day....
My last flight out of PHL was as far as physically possible from the Chase lounge. It took me 15 minutes to get to the gate.
You can spend more time than that just walking from security to your flight at major airports. It'll probably keep the supremely lazy away, but that's it.