"Cleaning rares in all maps was repetitive so we made all maps have bosses"

I think that's the real gist here, everything is repetitive if you have to do it all the time.

You get Abyssal in every map then it stops being a "cool event" and it just becomes the same thing you do in all maps.

Cleaning Rares was fine, but what was not fine was having to do it all of the time. Now we have to fight bosses and it ends up having the same problem. Maybe we could just get randomized map objectives?