Hmm. While I understand your point, I'm not sure about your example; there really is a huge difference in those. Being invisible doesn't protect you in the least from blasts and bursts, while
restricting smite shuts those down completely against anyone but the paladin.
Incidentally, I think that Obryn is going to loooose, mostly because he limited the errata to appearing in May.
Well, yeah, but one being an epic level encounter power, and the other being a heroic at-will, the difference in power level is actually understandable. But they fulfill similiar roles: Lock down attention onto the battlemind.
Let's be honest tho, if the mob is an area-using monster, then 'I have a battlemind standing beside it' is pretty much the foil for that. I wouldn't be using Mind Snare on him tho, I'd probably use Twisted Eye, which is the Battlemind's equivalent of Enfeebling Strike. And so good.
I submit that yes, the battlemind is not as sticky as a fighter. But that's like saying a battlepriest doesn't heal as well as a cleric. So what? Those are the classes that are the top of their respective curves for that. You -can't- exceed those levels, nor should you.
But look at the Paladin. Is that a terrible defender? No, not at all. He can do that job very effectively, but he can't rely on Divine Challenge to do all the work, considering it's not a lot of damage, and a lot more restrictive on the paladin's actions. He needs to use his at-wills and powers to supplement his defending, but when he does, he does things a fighter simply cannot.
Battleminds are kinda like that. No, they aren't as 'sticky' as a fighter. But they do stuff no fighter can. Hell, they do stuff no
defender can, and do it very well, and that stuff they DO do, is terribly good things for defenders to do.
And every defender has their weakness. Battleminds happen to share the same weakness as wardens, that an enemy that shift-charges is hard for them to deal with. The difference tho, is a battlemind can have at-will powers that negate that weakness, a warden simply cannot. (and no, if Nature's Grasp were sufficient to stop this tactic, blurred step would have done the same for the battlemind.)