BL: based on what you’ve said in your OP, I would NOT give up your seniority at AA to come to DAL. Been at DAL for over 6 yrs and live 3 hrs away from DTW. I can tell you the base and schedules have dramatically changed over the years and not for the better (NB schedule optimizer, early reports late returns coupled with a 3hr drive, Equipment changes, base downsizing, CVG closing, New management, just to name a few).
I think the previous poster said it best when he recommended move to Western MI and drive 3 hrs to ORD.
If you want more insight, PM me.