I'd also point out that in the clips I watched they didn't seem to incorporate any sort of live sparring. Although I understand people may not want to focus entirely on sparring in training, IMO it should done at some point to help the learning process. Even if the "attacker" moved around a bit more in the drills, it might help give the training another important layer i.e. that of an non co-operative partner.
"Let your food be your medicine, and your medicine be your food"