The Mug change, predictably, feels like garbage.

[VentVanitas]

Personally, I don't care if Mug "works better" in the context of raiding or general party play. 6.1 NIN feels way too similar to MNK, and that's not a positive thing to say considering Monk doesn't even have an identity for itself. Ninjutsu and Blitz are too similar, both jobs have problems of having nothing to do or manage in downtime, both have an unremarkable job gauge that is primarily spent on one oGCD that has overcap problems, etc. I do not see the point of the TA/Mug change when they could've just buffed its potencies.

Why even bother having 60s cooldowns anymore at this point?

I’m not a monk but wasn’t their rework fairly well received?

Primarily by people that did not play the job. If what you wanted out of MNK is a standardized job that has relatively little jank, then EW MNK succeeded in that endeavour. However, that came at the cost of basically everything else that was unique to it, whether it be Greased Lightning or heavy positional gameplay. What it gained did not make up for what was lost.