Have they not acknowledged that this revision is attempting to rectify perceived issues with the games as it is? That's a serious question-- I thought they had, but now can't pull any specific instances to mind.
There's enough blame to go around, there. The fanbase overreacted (particularly the part of the fanbase that love the notion that the devs are clueless), but at the same time the Druid that got to UA seemed genuinely incomplete for even 'play this and tell us what works' level playtesting. Someone speculated that someone was told to 'fix wildshape, the pick-anything-from-beasts-list is a problem, as is the proliferation of extra HP' and so they fixed those, but then didn't then look to see if the resultant druid (and moon druid) as a whole filled any given roles or the like.
Martials, in general (and yeah, I can see why Monk might take longer), could be less controversial. People generally agree on what we want them to be, and what problems need to be addressed (balance vs. other options at high levels, OOC, more interesting in-combat decisions), if not how best to do it. With the druid, they were running up against ill-defined 'what even is this class supposed to be?' issues, along with whether there were problems needing to be solved in the first place.