Need a recommendation. PHL based. Fly to SEA about once a month and one other domestic trip monthly. The loss of AA hurts. I can't fly much out of PHL on AS, except for the monthly trip to SEA. Not sure if I'm better off completely switching to AA or not. My past experience I've been able to get Plat on AA, but it does absolutely no good out of PHL. Everyone flying AA out of PHL seems to be PlatPro or PlatProExec. I never get any kinds of upgrades, but I get upgraded about half the time on AS. Any suggestions/recommendations?