As I said before: The removal of hyper armor was really devastating to thralls. Their lack of AI and rolling makes them almost helpless in some encounters without hyper armor.

Three level 1 exiles with spears can kill a high level thrall.

I don’t think that hyper armor should have been removed. But even if one thinks that idea to be valid for some reason, it should only have been done if the AI would have been improved massively. Which it wasn’t.