I am primarily a Tekken player, and I find that the game I love sits in the same boat you described in the OP. Unfortunately, I believe Tekken is more of a lost cause than P4A, because the reaction to Tekken coming on stream, for some reason, is complete vitriol and rejection. The competitive scene for the game is also very small and scattered around the US. Many regions in the US do not have casual meetups or regular tournaments.
I did buy P4A after watching EVO finals, and I hoped to play it to learn how to get a grasp on airdashers for when the new GG comes out. Maybe that game has a bright future?