The reason Delta gave 9E a new contract is because they were able to get it cheaper. Remember how 9E was making money on the -200s before? Not anymore!!! That's why 9E wants concessions. Delta: "We will give you the DIP money if you sign a new contract with us in which we pay you a lot less money to operate the -200s" What choice did 9E have?
Shouldn't be hard for Delta to offer a more profitable CPA if the current one is so bad and do some 2 for 1 type trades to get rid of -200s. Especially if the current CPA is a money loser. If you were running 9E, would you trade 5 money losing -200s for 1 profitable -700/900? Hell ya you would. 5-1 anyone? 20-1? Just depends how many -200s Delta wants gone.