I'm not gonna pretend to like his schtick, but the guy is a legit talent. For me, I found the grappling exchanges with DHK entertaining, as much because Dong was able to regain his feet every time and was attempting his own throws. Ultimately, Colby just plain outgrappled him and showed that he can scramble like none other from the bottom when Dong put him there. Flashes of good standup skills, too.
I have no idea why the judges felt the need to award him 10-8 rounds for that performance, though.