He doesn't seem to have a lot of positive opinions about the balance update - applying boons on druid seems much much worse than before (requires lots of ability spam and makes CA part of rotation instead of a reactive action), scourge has been hit hard and suffers from the same problem as druid when it comes to boon application and herald lost flexibility in how you play it due to the upkeep requirement.
Kind of simultaneously agree and disagree with Muk's take on scrapper (it's actually amazing if you play around HGH and blast finishers in kits like it was still 2013, but I also get that a lot of players would rather delete their engies than suffer that), but all in all he's spot on. Forcing classes to waste critical/situational skills in order to do what a couple can do just by hitting 1 only results in those classes getting shelved by players, especially when it's brute-forced in such a way that it actually removes aspects of the class/spec's identity.
Anet are probably rushing to get the expansion out on time right now, but I hope they've set aside some time for revisions on this stuff since it's becoming a summer tradition.