If you left within the first two months of launch the game has changed in a lot of ways. The core gameplay is still there but they've added many QoL changes over the past couple of patches along with tons of content. If you haven't played since 2.1(December 2013) or before there's more then enough to fill your appetite now. The grind that was present in 2.0 with only 1-2 dungeons is no longer a thing neither is only leveling off fates. Weekly capping has a bunch of options Dungeon Roulette's (Multiple Types), Hunts, PvP, Endgame Coil, CT/ST 24 man raids, Treasure Maps, etc. Not to mention leveling has its own Roulette's along with weekly challenge logs and dungeon XP was vastly upgraded to compete with fates. If you enjoyed the game but the CM/Adampor grind turned you away its not an issue anymore.