Well, I did my 4DP Full Frontal, today. I wrote up a report here:
Some good and some bad. I’ll likely just change my NM and AC back to what it was before. I have the same Sprinter profile as before. The only real difference is my weakness is now repeated efforts instead of VO2 due to my poor 1 minute showing. That may or may not be more or less accurate. 
The real interesting thing is that my LTHR has now shot up to 162.
My highest LTHR ever was 159 back in December. Otherwise it’s usually been around 155, sometimes 157, a couple times 152 or 153. When I’ve been in better shape it was 157 or 158. So, jumping up to 162 was not expected. It was just 158 in HM just this last Friday. And although I know I probably could’ve gone maybe 30 seconds longer in HM, I doubt it would’ve jumped my HR up 4 points. Maybe this is what I get from actually doing a REAL recovery and not just pretending while still riding a high volume at low intensity? It’s not like I’m getting any more sleep. lol. Definitely not.