Vashj’ir is hands down my least favorite zone in the entire game. I did it once for the campaign and did everything in my power to go back there as little as possible afterwards.
It just created a sense of constant dread and anxiety in me whenever I was in the zone.
Not to mention, Blizz still hasn’t worked out how to get NPC’s and game mechanics to function properly on the Z-axis.
They removed the water from the underwater delves for a reason.