Guarantee me those things and we can talk about giving up seniority.
History guarantees pay, QOL and company stability change. Ask anyone from UsAir,DAL,UAL etc. Not long ago SWA was losing pilots to all of them. Now they're on top, good for them, that will change. For all I know I might make less at SWA in a few years than I make now. Think that can't happen? Ask Capt Sully.
Comparing seniority to a current CBA is apples to oranges, a known to a variable. Arbitrators know this.
Two points - although your point about history guaranteeing that pay, QOL, and company stability change is valid, it is also valid to point out that historically (without exception) SWA has exceeded AAI in every category, throughout the lifetime of AAI. There is nothing that suggests that would change in the future.
Secondly, although you are afraid of "giving up seniority", I think you have it wrong. No one is going to ask you to give up seniority, mostly because on the SWAPA master pilot list, where you will end up, you currently have no seniority status at all. What we do expect is that the seniority that you accrued at AAI will be fairly and equitably translated to appropriate seniority on the combined list. The inclusion of "equitable" in the A/M provisions implies that all seniority is not inherently equal, and that a fair solution requires making an equitable conversion. As a tongue-in-cheek example, it would be similar to coming back from Mexico and converting your pesos to dollars. Obviously, they are valued differently because they were earned in different environments and surely you wouldn't expect to receive 1 P per $1. Similarly, it would be neither fair nor equitable for the seniority you earned at Air Tran to be converted to SWAPA seniority on a 1% for 1% basis i.e. relative seniority. (BTW, my peso analogy was not meant to offend, you guys are not Mexico to our United States - probably closer to use the $ vs the Euro
).
As to what's "fair and equitable", hopefully our NC/MC's can figure that out. If not, it will be what the arbitration panel says it is. At the end you will "lose" all your AAI seniority as they'll cease to exist and it will be replaced with SWAPA seniority, at an exchange rate TBD. The only guarantee I will make is that you will still be senior to everyone you are senior to now
.
Respectfully and Fraternally,
PapaWoody
Going to enjoy the last of my 24 hour LAX layover; the beach was awesome, got some goodies for our back end return crew and some awesome sushi (some of the best in the country is here on the left coast). Life is good, enjoy it! 
