I’m going to take issue with the effort side of the comment. There is a reason so many rage filled posts come up about IO/leavers, and those aren’t from the 15+ key community.
A large part of the WoW community is just not very good at things. I don’t mean this as flame but it’s a fact. People who find success in m+ either have a group they run with or are slightly above average player skill.
The balance part I feel like should come in the form of class balance. Rogues don’t and probably never did need a damage nerf, but they have so much utility packed into 1 class its insane. Not to mention other melee classes are walled off by arbitrary cleave caps or long CD windows. Casters are stuck with long interrupt CDs or no interrupts at all. If this is the way going forward, the playing field needs a little leveling.