I'll come out and say it right away.
Fantastic work ZOS!
I just did some testing today for the feel of werewolf, the new challenge mode difficulties and (of course) frost warden.
I was at work when everyone started dooming about shattered paths signet, and it was then promptly cleared up by Gilliam in
@skinnycheeks stream that the only nerf that is staying is the pet one, which for bear specifically is justified, however, it's actually still insanely strong post-nerf. It'd be nice if sorc pets didn't cop a stray, but bear's interaction with it definitely needed to be nerfed.
These are my results from my master's ice staff theme build settup


I really like the changes to northern storm and nature's gift too.
Other than that, Honestly i can't really think of anything i dislike about this patch so-far from the things i've tested, it's all been very fun.
Werewolf's changes feel good. the new model has been cleaned up in the right ways and i now like how it looks. The fact that werewolf now provides the group aoe major courage and minor force is simply wonderful for making it feel wanted. the gameplay loop of consuming blood hunger on rip and tear is fun and engaging, and being able to benefit from werewolf even as a magicka scaling character is so good for not just the ease of gameplay, but also has good roleplay implications too for people who want that.
I will legitimately play a werewolf character now as opposed to ignoring it, though i do have 1 point of feedback, i think that the malabal tor medium armor set "Salvation" should be heavily buffed, specifically its weapon and spell damage bonus while inside werewolf form, as well as changing its 2-4 piece bonuses to weapon and spell damage, offensive penetration and/or critical chance.
Moving on,
Challenge difficulty is just that! it is very easy to die on vestige mode, but a -80% damage done effect actually does not feel anywhere near as bad as it sounds on paper. enemies feel like they have an appropriate level of HP and aren't just sponges.
I haven't tested other classes masteries though many of them seem really awesome. i especially like nightblade and arcanist's ones outside of my own class's ones.
Honestly this patch is a massive win ZOS. I simply cannot wait to see how the warden refresh goes. You have my trust.