Finally got to maps and I have to congratulate GGG, their tuning felt pretty much spot on. However, few fights stick out like a sore thumb, particularly for melee.
Arakali. 50% is a snoozefest, then Silk gets turned into a snack and she basically murders anyone who gets close except for a few seconds when she is on fire. The damage is mostly chaos, so unless you are twinking, your chaos resist at that point is probably -30%. Ranged can keep dodging, melee not so much. There's also a general visibility problem, since the room is black and all the bullshit on the floor is slightly darker black.
Quicksilver jizz boss. You get stalked by his bubbles and you can't really shake them off, they just stack up during the fight and melee is generally much pickier about places they can fight in. Weirdly enough, the boss himself felt mostly harmless, if not for his balls.
Kitava v2. I basically deathzerged the boss, since the closest WP is 2 maps away (come on). He is Malachai 1.0 with even less room to dodge his crap. His black breath oneshot me, his fire oneshot me, both with max resist thanks to basalt flask and then there are the add phases, which turned it up to 11 in my opinion. Dodging all the crap they spew while trying to do some sort of dps is next to impossible, unless the way the phase is meant to be played is dropping Ancestral Warchief and playing Ikaruga where a single stun kills you. There are also quite a few bugs, mostly related to things not showing up on the ground, because as far as I can tell, the fight doesn't stop when you leave the arena and there's no zoning immunity, which can get you murdered upon getting in. Oh and somebody tell me why those two flying twats have to be there and get in the way ? They are just window dressing instead of contributing any meaningful mechanics as far as I can tell. The mechanics were fine and quite interesting, however when a fight murdered me 10 times more than the rest of the campaign combined, you should probably tweak the numbers a bit.
Anyway, the story is awesome, fights are good, the monsters interesting and varied, if a bit too inspired by Dark Souls. 10/10 expansion.