Eh, I don't think PB is exclusively the problem outside of its janky timing, the freedom you have with the inputs is one of the very few joys I've been having with 6.0 MNK. Limiting Blitz purely to PB however, is what I have issue with.

As for the oGCD drought, I don't see what's stopping SE from making Phoenix Rising available from the get-go and just make Flint Strike an oGCD attack. (Or Steel Peak/Howling Fist for that matter)