Just some thoughts on your excellent post!
"Neurological efficiency" is the least important factor to concern yourself with. As you do Pull-ups in your normal training this will be gained. that is one reason why GTG is inferior to the other methods discussed on this thread.
Also, while I agree "speed has little carry over to endurance" (and in fact hampers it in the long run), it is in itself essential to one set of max reps, as speed determines momentum which in turn means less fibers need to be recruited!