So the existence of watered down 10 versions of a fight doesn't constrain the design space of 20M? Cool, I guess we can stop talking about why that's one of the important reasons for the change.
How did you get that from what I said? I said literally the exact opposite. Removing mechanics from lower difficulties is fine and in fact expected. You can't do that if both sizes retain mythic difficulty because they wouldn't be the same difficulty at all.
I'm not sure what you're smoking.... but I want some.