We also didn't have the ability to spec it out in builds back then, which is why many people feel like this is a push to get players to buy more respecs after gear changes.
Back to the OP: I like the mobs, I like the difficulty, I absolutely hate the dungeon mechanics. Unlike Onest which lets you feel like a total BADASS when you smash a gem and go totally ape on him, this dungeon feels like it was designed solely to waste your time/take more time to complete. I feel like Ankama got a lot of heat after tokens came out that the game was 'too easy' and the new token requirements/dungeon are their response to this.
As usual, I don't think it's the optimal approach and I'll likely wait until easy strats exist for it to invest too heavily.
I think it's more about mobs having elemental weaknesses, and this puts the players on an even field as with the mobs.