I was over there for 10 years before making the move across the street. It is a great group of pilots. There are some major issues with the current leadership, but they do take their orders from someone much higher up then they.
That said, they are readjusting the ASA footprint in ATL. DAL has no desire to put ASA out of business. DAL needs them for the feed. They are the first ones to admit that with out the feed DAL is dead in the water. ASA will be around in some way shape or form for a long time. Maybe a different name, or something with closer ties to SKW, but the flying and certificate need to survive for many reasons.
On the contract front. I would be careful about this with the line guys. They have been fighting for almost five years for what many other companies have had for a lot longer. Are there things that they would give up, yes, but we know why they are still asking for them. (Shoot for the stars and if you hit the moon it is OK) The sides are are less than 10 Mil apart. That is nothing in Airline speak. It will happen someday.
Just know that for now your career is on an elevator and upgrades will be near two years in the near future. Best of luck. ASA was very good for my career.
On a side note. The training that you will receive there is second to none. ASA really knows how to standardize their flight decks. You will realize this when you leave there. It truly is a class act.