Animated Armors, Doom Armors, and Thralls are the only enemies I think need adjusting.
I think the real problem in some of the dungeons is just that the monster mix tends tends to have too many different types of debuffers. A few debuffers creates interesting tension, while too many debuffers creates the over-exploration problem.
I think if they adjusted those three monsters, added a random base monster to each Hard/Vicious dungeon (like the random boss), and gave a +1 XP bonus for equal level monsters then everything would be great.