I still don't understand the point of having two versions of the House that you can travel between by using the mist. It really doesn't add anything interesting to the place.
It adds to the confusion and being in an otherworldly place where you don't belong.
My main problem with the House really is that it's
not weird enough. It feels like I'm exploring elven ruins instead of a purely illogical place set in the world of faeries.
The teleporting mist adds confusion, but it doesn't really add atmosphere. Both versions of the House look the same and have you encounter the same types of enemies.
I know it was much worse originally, but fighting ghostly guards and the Wild Hunt is still a chore. I didn't mind repetitive fights in Vordakai's dungeon, but now that the player is getting close to the end, there shouldn't be so many bland encounters. Having more non-hostile encounters and developing the boss fights would have been much better for the atmosphere.
The loot doesn't help either. Half of it is useless, the other half consists of items that would have been nice at the beginning of Act 5 but now leave you completely indifferent. Very little contributes to the atmosphere (Nyrissa's books are one of the few exceptions, but I'm not going to be patient enough to find all of them).