After all Velasquez did more offensive grappling than the BJJ black belt Dos Santos is supposed to be. Velasquez went for an armbar and a couple of times it looked like he would be going for Dos Santos' back, but the latter turned around in time. But Dos Santos did virtually no offensive grappling. He didn't even commit to a couple of situation where he could have tried for a sweep.
I should have just rephrased my initial post to "an offensive submission game", rather than over all BJJ, that's what I meant originally.