Designing an MMO like a theme park? I can see where it's similar in FFxiv.
But an MMO needs to be fun at all levels, like a theme park. And *all* of the rides need to be maintained, not just left in the dust to fall apart- especially when new players have to ride all of those old decrepit rides first to get to the new ones. And old content is the majority of levelling in an MMO where replayability is a major point, trying different jobs. But we still see old job quests telling players to do mechanics and use abilities that dont exist anymore or never exist outside of guildhests which were supposed to teach players mechanics.
This is why the experience gain is like being shot into the sky on a rocket, and all new jobs released start at the highest level before the next expansion. They only care about the shiny new rides. It's a huge waste of assets.
The issue is it's not sustainable. The moment you have a subpar expansion, your game will have nothing to fall back on and revenues will suffer massively.
Rapid levelling hurts sub time, but more importantly it hurts player skill attainment. This is why people complain about difficulty when fighting striking dummy bosses and puzzle fights. That in turn encourages dumbing down jobs. When levelling a new job, I often feel I level faster than I can learn it. It might seem contradictory, but it's also not true across the board.
Regardless, the game does not teach you how to play the game.
The levelling experience is hurt further by scaling. Old and even current content gets made braindead easy just from gear numbers. Aglaia is the perfect example. I felt like it had actual mechanics that would still be fun if we didnt kill the bosses before they could happen, or if they weren't so slow to use them. The lack of rng is bad too, like where aoes will be or the order. They can have the appearance of being rng and reactive, but are actually always the same.
The theme park analogy is used to justify flaws in the game as if that makes it not flawed, and it's wrong. Over time there'll be so much dead content it'll be like walking through chernobyl to ride one roller coaster.