Well, let's take a look at each one:

MIA
Right now company is pushing very hard to allow satellite bases. Why? So they can reopen MIA as a satellite. We'll see how this plays out. If they can't get may be forced to open a permanent base.

LAX
Currently flying out of LAX has been given to Skywest, Mesa (being removed) and Compass. Compass's contract was for 4 years beginning in 2014 and will more than likely not be renewed without better contract for compass. Compass's choice not AAG's. Those 20 175's will probably revert back to Envoy, but we will have to wait 3 more years to know for sure.

JFK
Flying being transferred to another wholly owned airline of AAG's. May come back to Envoy as part of a merger, but both of these are highly unlikely.

Just remember the game plan:
Envoy to be all 175's (though some (most?) in management now think 35 CRJ700s will permanently remain here)
PSA to be all CRJs
PDT to be all 145s.

If I were choosing right now I would look at Envoy and PDT for wholly owned. Compass and skywest for non