Heh. It's funny. Dragotha, for 3.5 in Dungeon Magazine, had a page and a half stat block and was the longest stat block Dungeon published for 3.5. And 3.5 D&D is a heck of a lot more complex than 5e. Yet, here, we have a two page stat block and that's heralded as being simpler to use? Thank goodness I know that the Mouthless has Prestidigitation.
Again, in a combat that's going to last about 3 rounds (give or take), why do I want a stat block that gives me dozens of potential actions per round? And, again, since this keeps getting ignored, since DM's can't actually handle the complexity without making mistakes in play, what's the point of using higher complexity?
Do people really think that they don't make multiple mistakes per combat with high level monsters?