I don't mind the trash hitting hard, but good holy god, I swear they went overboard with the amount of it in some of the dungeons. The world, too, actually. Though maybe that's just due to high respawn rates due to a lot of people playing. I actually don't even mind a lot of trash per say, but in some areas, it's just downright comically overdone and mechanically/visually looks really stupid when engaged. (Though I guess that's something I've mostly always felt about large clumped together trash packs)
Other than that, I'm ultra-pleased with the dungeons, they're, for the lack of a better word, spectacles. Really cool scenes/fights, and the environments are all really cool. Dare I even say, epic, even. I like how in some of them, too, we don't actually kill some of the bosses. It's such an awesome tease.