The basic design idea is not terrible. Create content, give it a bunch of difficulty levels, power gains from lower levels gradually make higher levels easier.
I think there’s a simpler problem, this season is just way, WAY too long. Speculation is now that season 2 won’t drop until the first week of March. Making this like a 22 week season?! That was immediately preceded by a ~2 week preseason? This may end up the longest season in the history of WoW?
Of course everyone is bored, at a point where there’s nothing left to work for except Myth track, unsubbing, etc.
To pull this off without losing a lot of people they needed to release some awesome midseason patches, but they didn’t - the midseason patches were so bad, they probably should have just scrapped them and launched S2 faster.
Oh well. This is the way of modern Blizzard