We are our own worst enemy sometimes, especially when it comes to new aircraft. Pilots see new jets and think growth, and growth leads to upward movement, and upward movement means more money! I think at DAL our hope isn't for actual growth but rather that we don't shrink in size.
One thing to remember is our pay is a very small part of operating an airline...... DAL will purchase whatever aircraft it needs regardless of pilot negotiations. If we fall for the old trap of trading contract improvements for jets we haven't learned anything over the past 30 years.