To me, he's in a similar position of control to Chill Dog, one that frees up the left hand for grabbing the wrist for Triangles, Omoplatas and punches, but obviously takes away from other things like Gogoplatas. I think it's a nice option to add to your Rubber Guard game.
He should have grabbed Santos' wrist with his left hand to bring his right arm out when he got to the Triangles and Omoplata, as the right arm still being in didn't help. When he got it out and couldn't finish the Omoplata, he should have done an "orbit" with his legs to finish.
Edit: Also, Ben Saunders is only a Brown Belt and just completely dominated a Black Belt 2x BJJ World Champion in the Guard, Wrestling AND on top. Submitting a BJJ black belt is sometimes lucky, but that was just a grappling clinic, wow.