I have FaB as well, but I am not sure it's a better game. It's much more mid-range, which can make it more interesting, but I've played a lot of matches that feel very similar. It also requires best of 3 with a sideboard, because some matchups are utterly unwinnable. I'm glad it's around, but I dont see the player base growing past its current state. Now, I am very much anticipating release of their cooperative mode. This could be pretty epic if they put real effort into it.
I think some of the complaints with competitive magic is why Commander has taken off. Casual decks (mostly). You get to use more cards, and every game plays out very differently because you only see a small part of your deck. I don't play competitive magic in person, just on Arena.