What you described can work for a SHORT cycle (two, maybe three weeks depending on individual) - especially when all your ducks are lined up. However, you stated "Have a real busy schedule..." Could this mean that you may not be able to manage proper rest and stress?
Correct me if I'm wrong here but doesn't PHUL consist of two strength-oriented days and two hypertrophy-oriented days? If that's the case, this really isn't PHUL but your own interpretation.
Which leads me to my next question. Are you here for legit critiques or do you just want validation?
You got two posters here, Brick and IronAndMetal who actually look like they lift because...well, they do. And they're both telling you to ease up on the throttle.
Now you can add me to that list.
Internet advice taking 101: if you want to achieve a certain result - then talk to those who've achieved or are clearly in the process of achieving those results.
I can easily write a thousand words on how to better modify what you're doing but I won't bother.
So instead, I'll keep it brief. You don't need all that work at 90% or more; dial the heavy stuff down closer to 80% and occasionally go harder on those glorious fucking days when you know you've got it.