Well I have always thought rock-lock would go down hill since everyone was playing it. So right now, there doesn't seem much hope for it. Draggy decks on the other hand are still very fast and very consistant, Mt. Moon never stopped it before so why should BF. Problem is though, is that almost everyone will be playing BF and in abundance, that Draggy decks won't be able to do well, since in all there matches one of their opponents will be bound to get really lucky and play BF early in the game and maybe even have on in hand to replace counter gyms. Odds are against draggy right now, but later on it might return when BF isn't played as much. Who knows though, BF is a really good card right now, and it's played a lot not only because it shuts down rock-lock and Draggy, but Pidgeot is more widely played so BF is the perfect card against it.
I think we will see lots of decks out there with BF, probably even to a point where there are no Draggy/Rock-lock decks but every deck at a tournament has BF. lol. Everyone will try and counter everyone else, but in the end, no one is even playing the cards that BF counters. =p