More people play mobas than fighting games. I don’t actually see a problem with this whatsoever. More people play (and watch) football than skiing, this wouldn’t affect my decision to either play football or ski. If some dev/publisher figures out a way to increase the player population without inhibiting competition, then good on them, but I’m not going to start or stop playing some game because of that.
Look, you can have one of two things:
You can have a game with a local and regional community that you interact with and compete against a lot, make some friends, with everybody in it for the long haul, or
You can have a community headed by future marketing executives currently college, based around media exposure and large payouts that you will probably never get a share of, that will probably evaporate like Starcraft 2 once everybody finds some other game they want to play.
These are priorities that you might be able to balance, but you’re going to have to emphasize one, at least when things are getting started. I care about games, so I’m really just interested in the games and the quality of play in tournaments.