I think the "goodness" of it is dependent on the player.
And I think that there are two very seperate questions, is it good? and can it work? are two questions, though clearly intertwined. Clearly, if something doesn't work it can't be good, but things can work but not be good.
I think GW saying that it will be in their tournaments is a big sign saying that it does and can work in a tournament setting, but then surely a tournament is just a series of pre-arranged pick-up games and since it does work in pick-up games it must then work in a tournament setting.
Possibly.
I think that it will take a while to get our heads around the different possibilities and opportunities. I would like for it to add greater variation and variety in my games, after all we do get a little bored of facing the nth scyth list.