Even the dungeons you mentioned, while good, aren't as interesting as they were back in 1.0.
They were challenging. They had multiple exits, optional bosses, speedrun rewards, gear worth bringing to endgame, you name it!

Dungeons have turned into less and less of a priority. With hunt trains, and various other methods of gaining tomestones you don't need to grind them out like we used to. On top of they we've gone from 3 dungeons a patch to maybe 1.
Honestly, nows a good a time than ever to make them more challenging content again. Sure they'd take up more time, and they probably won't reward us like they used to, but at least they could be engaging.

I realize it'll probably never happen. Cookie cutter dungeons are what we've had for years now and that probably won't change. All we can do is hope for a Baldesion Arsenal 2, it's the closest thing we've had.