It won't be for DAL! The MEC would not vote to allow it out of a meeting and it would fail a MEMRAT anyway.

What is the quid we could secure if the company were to desire a change that allowed SKYW to fly it elsewhere (AMR/LCC/UCAL)?
More money?
Reducing the DCI limit by a number of airframes again?
Upping the MBH ratios?
Improving vac/trng credit again?
Moving res max to ALV 7.5?
ADG to 5:00?
We still have a list of wants, you never know when you can make some gains.

Lots of options out there where we can gain without really losing anything.

Merely holding the line and forcing the elimination of SKYW wouldn't reduce the RJ flying, DAL would merely ensure the flying was placed at another(undercutting) DCI.