The reason why we need grinding back is because there is a intense lack of long term goals, also I'd rather ppl stop using fun as a way to judge content since it's a very subjective choice, some find fun Eureka others don't, just as some like testing themselves in ultimate while others prefer 24 man raids.
Since MMOs targets a wide audience it's impossible to use fun as a metric at all.
I'd rather gut myself than play PvP, but I don't think that Pvpers shouldn't get content at all because of that for example or that they shouldn't receive what they ask of the devs