From the 'Buffed.de Interview with Ion Hazzikostas on Patch 8.2' summary notes:
"The team wants to see more class representation in Mythic + and the MDI and will consider this when adding affixes in the future."
How exactly do you think Ion and his team will go about doing this? How long will it take before they actually start taking action to improve class representation? My guess is that they'll just slam the nerfhammer on the FOTM classes and call it a day rather than surgically repairing the underlying problems with the classes. The usual suspects will remain undesirable after all this and in 6 months they will tell us yet again about how they need to improve on class representation. In the meantime, the changes they make will wreak havoc throughout the rest of the game.