So Torghast has solo mode, random mobs, random maps, random affixes, timed runs and several more features that are basically taken right out of Diablo.
...and this is not a bad thing, by the way!
I've long advocated for more randomness in dungeons. It would keep things so much more interesting than being able to use set tactics in every fight, even trash fights. I never understood why they didn't experiment more with randomness in dungeons. I guess Withered Army training in Legion was the first. And it was fun. Even if it was repetitive because it was so limited, you at least faced something different each time, and not something you could just minmax, you had to use your instincts.