LAXSAAB is right about most of the attrition being FO's. I checked with a couple of my buddies over at RAH and last month the attrition was 27. 7 Capts. and 20 FO's. According to him the FO's see little future at RAH. They have the top 500 Capts. that are mostly lifers. Many of them did not plan on being lifers, but got caught up in the stall of the hiring at the majors. They now have a decent QOL making a somewhat decent wage and are going to wait it out to see what shakes loose at RAH and the majors over the next few years.
Consequently, any movement is coming from only the bottom 500 Capts. That leaves little hope for the over 1,000 lifers. It may be a long shot to go with RAH, but you might move up the FO ranks, but upgrading could be a really long time. Also, just about anyone over there will tell you that a furlough is very likely. Between the bleeding of red ink and BB needing playing the mgmt strike playbook, there will be furlough in the next year or two. You won't make it up the seniority list quick enough to avoid it.
Both of my friends said -- "Tell him to go to Houston" -- both are current FO's.