Good points. I don't disagree with your analysis of the use of H. We'll continue to keep H involved in the run game. It's just too easy to run jet sweep. Not a lot of practice time invested to keep that wrinkle in the offense. Also, while we're talking about winning 1 on 1 battles vs. Cover 0, matching up your H with a safety can give you an advantage with H being a quicker route runner (whips, option route, etc).
As for your prediction of more multiple TE sets, it looks like that is the case with recent recruiting. To me, it fits right in with moving away from the Option run game. In a traditional double tight formation, you have just added another gap to the backside of your inside zone. With that, you are pretty much guaranteeing that the QB will not have to pull the football and run. It goes from zone read to just inside zone essentially. I think the future of our QB run game (post JT era) will be limited to scrambles and designed runs (q draw, q counter).
Taking the option out of the run game allows more time to spend working on throwing the football. An improvement in the passing game would provide better balance, which has been a stated goal of UFM. The question in my mind is when do we see the transition? Does it start while JT is still in the saddle, or is that wasting his skill set?