I can see that you hold much interest to this aspect to lifting we now call TUT. I'm also interested in it, however you seem to focus a lot on the micro view of it, where I seem to focus on the macro view of it. Yet, we both appreciate its benefits. By micro view, I mean your focus is on the rep cadence/time etc. My macro view on it focuses on the overall set rather than the individual rep instead. Taking this a little bit further, I see an advantage in applying the macro view over the micro one when taking overall volume of work completed into consideration.
It seems to me that because of slowing the rep down and making it one's prime focus, one loses out big time in the overall scheme of things, no different than seeing the forest for the trees. In other words, the rep itself, becomes the limiter, the bottleneck if you like. My question is this: why create a bottle neck when you have another option at your disposal?