Short term gains? The combination of UAL/CAL has the potential to be by far the world's most powerful airline. The synergies of this merger are way better than that of DAL/NWA. That's why they've been so quiet. They are secretly hoping you guys(pilots vs management, pilots vs pilots{747/777 issue} destroy each other.
I understand the pilots are bitter about the Air Lingus issue and the 1400 furloughs. But fighting management and burning the airline to the ground will not make anything better.
By replacing a 50 seater with a 70 seater(not adding a 70 seater, but REPLACING a 50 seater) the company makes more money, and adds more feed onto MAINLINE aircraft, which eventually could(or in Delta's case, will) result in adding more mainline aircraft due to increased feed, or replace over performing 70-76 seat flying with mainline. Just look at the ATL-MDW route for Delta as an example. That route used to be exclusively an E175 and CRJ900 route. The regional aircraft re-energized that market to the point that growth exceeded the airplane size and an Airbus A319 had to be put on the route.
Examples like this is the reason Delta has hired and will continue to hire for the foreseeable future. This same success can be replicated at the new United. But if the pilots choose to continue to fight with management AND fight with each other they are doing nothing except hurting their image, their job stability, and their own pocketbook.
If you think that is why Delta is hiring, trying to rationalize anything to you is hopeless. The MBA a-holes who run these companies only look at one thing -cost. They could give a s**t about long term investment, THAT is why they want 70 seaters. This is nothing more than a test of wills because if they folded without a fight, they would have to explain why they folded to the BOD's. The economics of 50 seat jets are dead, with the 70 seaters not far behind- $85 per barrel oil has put a fork in them. They know it, we know it, and Wall Street knows it.