The reason F9 pilots don't want RAH pilots to come over based on seniority number alone, is that there is no screening of the pilots to see if they fit in at F9. F9 employees love their airline (obviously) and are afraid to dilute the waters. If you interview and recieve the stamp of approval, then it doesn't matter if you are a lowly regional puke or a freight dog. It's not about who is flying what, it's about who is a good fit for F9.