AA at
ATL has a pretty healthy selection of mainline with 9X daily to
ATL (mix of A321/A319/B738/MD80), 2X daily to
MIA and don't forger the new
LAX service with
3X daily mainline. Also
ORD now has 1 daily mainline on a B738. Plus plenty of USAirways Airbuses and E190's.
Now
ATL used to be 10 or 11X daily and
MIA may have lost a mainline frequency or 2 but the new
LAX service and re-introduction of mainline to
ORD pretty much makes up for that loss. However some of the
MIA flights used to be on E145's; now it sees nothing smaller than
RP E175's;
ORD sees nothing smaller than the E175 as well.
LGA sees
5X daily CR7's (probably less on Saturdays).
Additionally
ATL has all mainline employees both above and below-wing and is one of the larger LAA outstations aside from the "cornerstones."