Lex:
Looked great, but they didn't really showoff some of his moves good enough. At one point he throws a little drone into the air, but Joker hits him and it disappears. We have no idea what it's purpose is still. Something tells me that we can't assume all his potential yet, but just a good amount of it.
I posted this in the video thread. It's combos only but it gives you an idea of who's done what besides spam and get hit across all the "official" videos.
GA by far has seen the lion's share of real actual activity followed by Batman and healthy doses of Catwoman / Grundy. Everybody else is kind of neutral in the amount they've shown with GL, Deathstroke and Bane having next to nothing to show for themselves.