The Variant Dungeon Formula - only aesthetics and enemies will change

[Absurdity]

Then you don't know how development cycles work. They plan this stuff months in advance, have schedules, budgets etc... They cannot just reverse course on content they had already been working on for months. This is why significant changes only occur much much later and usually in the next expansion where they can plan for these things.

It doesn't matter how their developement cycle works, it's not even my problem if the next variant dungeon was already in developement at the time they released the first one.

If they can't react to the feedback in time then that content will basically be DOA and we won't see any more variant dungeons come 7.0 because it "isn't worth the resources".