3rd charge of PB would 100% be a big mistake. People are complaining about there not being enough to do between Blitzes right now. If PB had 3 charges, you would use all 3 charges in the opener and then wait 2 full minutes to regenerate all 3 charges so you could blow them all at once again during raid buffs. Keeping it at 2 charges ensures you Blitz at least once a minute. At best I think maybe they could reduce the cooldown of PB to 30 seconds, but this would greatly increase the total damage you get from Blitzes, so they would need to be weakened as a result, or Monk's damage would have to be nerfed in other places.

As for positionals I think they are fine as they are now, and I was someone who was a supporter of Monk's positionals for years. Blitz is difficult enough without having positionals on top of it, although I could see the potential for a design where positionals are returned but PB lets you ignore them. Even so, I was always frustrated by the Bootshine positional because of how much damage the crit represented, it was extremely punishing to miss. If they were gonna bring back any positionals it should be on Twin Snakes and True Strike only imo, but I don't think they will just because they never make jobs more difficult on purpose even if people ask.

Rather than positionals or more blitzes I would rather if they added something else. Some new cooldown (or two) that doesn't always line up with burst so there's a bit more to do between Blitzes. But there would be the matter of how to make it interesting, and I think such a thing should only come alongside an increase to the chakra cap because even as Monk is now, you miss out on so many chakra because you can't spare the weave window to spend them.