I don't think so.
Going way back to where we brought in AMFA (2004 I think) AMFA wanted to come in and make waves to show the industry how they work. Our membership told them to not mess with our relationship with SWA. So they backed off on being the bully towards our company, which made for way better relations as well as much better improvements to our contract and in house maint and shop work. SWA was surprisingly impressed how they and AMFA were getting along as SWA too, was expecting a knock down dragged out fight after the big blow up over at NWA.
As far as ALK bringing in AMFA not sure if ALK fought that or not. I would think the co. would have loved the mechanics staying with the teamsters as they liked doing back door deals with the co's where they represented, AMFA cannot and does not, too transparent. I will add that Kinder liked nego with AMFA at ALK, he said so himself and he also said he looks forward to repairing the damaged relationship caused by this new regime within maint. He wants to get back to the way it was back in the day before SWA ruined the relationship between the mechanics and company.
As of Horizon I have not heard as of yet any resistance from the co. about the teamsters being fired and AMFA coming on board. I will admit that a lot of us here at SWA was a little giddy over AMFA successfully taking over another mechanics group from the teamsters yet again. Now just need UAL mechs to fire the teamsters. And of course still waiting on AA mechs to pull the trigger as well...