There's plenty of journey in the leveling. The pacing however is that you feel progress in your journey rather than feel punished for not grinding harder
You log in, play for a few hours, and log out feeling as if you accomplished something. That's the kind of pacing they've been looking for in the game, and it works well.
The game also slows down a bit after your first 50. Now, you have the capability of playing in endgame situations while you also work to expand your availability and playstyle, the system slows down to to quest availability (and the fact that you've already progressed in the main story quest, which is a sizable heap of exp.) Meaning you feel the journey expand a bit more.
You're encouraged to take the time leveling your other classes, and to enjoy the trip during it. But it does it without holding endgame above your head, as your first class is easy to level.
In any other MMO, this would be a problem, but in a game where you can and are encouraged to level multiple classes - where otherwise you are essentially limited to just one unless you want to start your game over.