Some ideas I've had floating around, with Bootshine and Shadow of the Destroyer both being Auto-crits, why not make Opo-opo the 'Crit' form. Give an Auto-Crit to Dragon Kick, you can then generate more chakra between PB windows. Of course, we are still adding positionals back in.
This next one is still a new thought for me, but changing how PB works. One thing that I see might spring up is the weird timings of your buffs/debuffs when you want to PB, you need to make sure Disciplined Fist and Demolish aren't going to drop, so this could help mitigate that issue. When you activate PB, you get a new GCD for Opo-opo, Raptor and Coeurl, which has the benefits of both attacks from the standard rotation. By that I mean:
Opo-opo - Uses Leadon Fist to make it stronger, but also gives you the Leaden Fist buff. Then, of course with my earlier suggestion, it would auto-crit as well.
Raptor - High damage but also refreshes the Disciplined Fist buff.
Coeurl - High initial potency but also refreshes Demolish. Now, this could come with a change to Demolish. Rather than just straight up replacing the Demolish debuff, have Demolish be extended duration wise to a maximum, like how Shadow of Death on Reaper, or Surging Tempest on Warrior. Changing Demolish to work like this is probably the thing I'm not 100% certain of but I do think it would benefit.
Issues I can see are, when you do the blitz for all of the same form, you are spamming the same attack rather than having it be varied between 2. I also do not know how it would interact with AoE attacks, should the AoE attacks not be affected, or should these new GCDs be AoE attacks themselves, meaning the whole Masterful Blitz Window is AoE.
Just some idle musings from someone who has a brain that's way too active when trying to sleep, but I would like to hear thoughts. It might not fix all problems, but it might help alleviate some of the pains.