To paraphrase, "this is the sixth time we have leveled a theme park MMO character, and we have become exceedingly efficient at it." Its been sixteen years since 2004, we know all the beats, know all the kill alls and fetch quests, know the metas, and know the feeling of being incredibly underpowered compared to the alts you already have at max level. I've seen differing attempts at re-inventing leveling - I see you TSW and TESO - but in the end its still all about growing a character when you already have characters fully grown. We've been there before, frankly we're kinda bored with it, so we say "Get on with it" and hop on the powerlevel train. It is what it is.
The term 'End Game' is what happened.
Powerleveling always had a place, usually with a purpose. "I want to _____"
It seems lately, at least to me, folks race to create a T4 50 only to be disappointed.
Honestly..
Just say:
'The End'
..wanna keep playing, have at it. There was never any End Game, that's a marketing term to suck dollars from dummies who would pay their way there.