No doubt it's nice to climb like that when you've got lots in reserve, but being good at that sort of thing isn't what's holding him back from whatever his goals might be.
I'll grant you that me and Matt are different climbers, geared in different ways, but I dropped the move on Metal Guru that I'm talking about on redpoint because I was too gassed to do it. I don't know if Fiend ever got to that point but it is definitely possible that he would have been too gassed. The point is that he had no plan to do that top bit efficiently, and ultimately if you want to explore the limits of your body's capabilities on steep limestone you're not going to do it by Dawesing around without your feet on.
Having read John's book, I can tell you that if Fiend goes to him he's going to get told to use his feet more. Maybe not when he's on his best behaviour and locked into death-shuffle mode, but definitely when he's safe and sound on bolts and switches off the part of the brain that tells him to keep his feet on.