I don't play it because it doesn't reward you with XP(or at least, as much as regular matches do, just the bonus XP).
I agree with randomhero204. They should have had maybe certain camos or customizable cosmetic items for your guns as unlockables only to be earned in league play. Then I'd play it.
But as it is now, I'm only going to play them until I get my 5 wins achievement for it then I'll be back in public matches.