I do not believe any of the hubs will see much of a cut back at all. In fact, most of US Airways' changes such as reservations/training facility consolidation, maintenance, increased FLL flying, other increased international flying, and the PIT pull down is all part of the pre-merger restructuring.
So has been US Airways' orderly aircraft reduction, which will reduce US Airways mainline fleet by 46 aircraft (10 A319s and 36 B737s) and the likely transfer of 25 EMB-170s currently flying and 3 waiting delivery to Republic. That's a total of 74 aircraft leaving US Airways Group's inventory, although the EMB-170s would remain in the network.
I suspect if anything is reduced further it will be PIT probably with the November schedule change. Moreover, there could be more aircraft rightsizing and I understand America West could lose aircraft too, probably B737s, but most of the heavy restructuring has already been announced.
Finally, there will be growth in the Midwest, to Hawaii, more to Europe, and I believe a Midwest hub created. In my opinion, the hub could be in ORD or DEN if United fails and if United gets through this week without a "shock" event then STL or DEN with Frontier are options.
In regard to pilot staffing, the airline is extremely short with Check Airman flying as first officers, flights cancelled due to under staffing, and all VLA's cancelled. Pilots on VLA were recently sent a certified letter telling them they had to return to work by June 1 or resign.
We should know more about all of this very soon.
Regards,
USA320Pilot