Bases come & go like the latest fashions. Remember bell-bottoms?
I went to TPA to look for a house.....cuz USAir was gonna open a TPA base. That was in the mid 1990s. Any base there? Ever? Yeeeeah.
DAL will dominate SEA, NYC & ATL. The flying will be moved around to maximize profits.
Bid what you want & want what you bid.