You've shared a lot of GREAT information in this thread and have the results to back it up. I agree with almost everything you've said... but want to respectfully challenge a couple points.
1: Approaches to failure are absolutely where the money is at. So why don't you progressively add more approaches as you progress through a mesocycle?
2: Why so many warm-up sets? To my eye, they look like a bit of junk volume - and energy that could be spent on more approaches to failure
For example, on a cold muscle group, I do one warm-up set at 50% working weight for 10 reps, then one set at ~75% working weight for 5 reps, then one set at or ~10% above working weight for 2-3 reps. Then my working sets range from 1-6 depending on where I'm at in my meso.