i did level up 3 class to 50 (4 if i count smn/sch), i have only one class in dl+relic.
however, by doing this i have get a better understanding of the game and it mechanics, i have discover some stuff i can do with class like scholar that i will have miss if i had only play this.

i will still say something an mmorpg, until it get it second patch it's still in the launching process. you can't put all the end game stuff right of the bat, they have remake all the game (leveling, zone, quest system...) you can't hope to get all the stuff of endgame in this condition. with the 2.1 more stuff will comes (too lazy for list what was announced), but i can understand that people want everything now... sadly patience is a virtue in the mmorpg world.