At the very least, wait to see what happens with the TA so you can make the most informed decision.
It may be good and you say it’s worth staying.
MEC may vote it down or pilots may vote it down.
Definitely find out avg time to capt in DFW. Because even though you’d be giving up pay cut as FO, you’d jump to capt faster. Plus you know only way DFW closes is if AA goes under… so it’s not like a small base which could be easily closed.