Not to take away from the other gameplay genres in wow, but M+ is severely lacking in long term rewards. KSM mount & title and a title that leaves everyone between 2000 rating and 2700 rating in no mans land.
It could still use better rewards for 20s. Why does pvp get its own tier set recolors but not mythic plus? Why design awful dungeon transmog when you can just recolor tier sets where the loot = normal recolor and then rating for the mythic recolor?
Why can’t we scale valor to upgrade loot to mythic Ilvl if we’re timing 20s?
Dungeon portals are really just okay, but should reset when you start a dungeon, not when you finish it. You bust a key and decide to go do another and you’re back to flying there.
Outside of loot and KSM there just isn’t much when it’s one of the 3 major pillars of the endgame and the only thing that’s still remotely fresh week after week 10 months into a patch.
I do agree though, those other areas could use updated achievements at the very least.