Hey dude!
Awesome highlight. I wish it had some better angles. I'm happy to give some thoughts on their back stuff and thanks for even being interested in my thoughts.
From the DVD and the matches I've watched it seems like they focus most heavily on getting to the weak-side and throwing in the body triangle. And keeping the head between the opponent’s head and the floor. From there they start to handfight and have a progression of grips that have a sort of hierarchy, with the infamous 'straitjacket' being the highest on the list:
But as long as you can get a hold of that top-wrist and get it below the line of their pecs then it should be pretty easy to use your top leg to trap it either inside the body triangle or trap it and put your shoelaces against their back
But sometimes (and maybe it's just a personality or preference thing?) they will skip that gripfighting and throw the arm directly across the jaw and just choke right thru it. In the finals it looks like Nicky said fuck all the grip fighting and he just threw the arm across the face and went for it. I wonder if time was part of the reason? Nicky got the finish with less just about 30 seconds left in the match. Maybe he didn't have time to grip fight?
So a short answer is yes from what I can tell they put more emphasis on weak-side and body triangle than trapping an arm. Although I think they like to trap one if possible.