It was the height of arrogance for the SWA pilots to even think of stapling the F9 guys to the bottom of the list. SWA was getting routes and jets in the deal. So they didn't want the Airbus, they still were going to fly them until they were replaced by 737s. That was additional flying that F9 brought in. You bring jets and jobs to the table, you keep your relative seniority. SWA could have brought the F9 guys in at a ratio of what, 12 to 1? Slot Captains in with captains, F/Os in with F/Os. That is the way it should have been done and it would have caused almost no disruption. After all, this was additional flying.
SWA and SWAPA have a history of screwing the pilots of the airlines that Southwest aquires. Just ask the former Muse Air, Morris or ATA pilots.