There is lots to do other then to grind. Just like most games
Dungeons, trials. Achievements. Lots of classes. Easy as cake to level. Duels, territory wars and arena. Daily quests that give CS, plus daily buffs for 50% exp. Ive gone gone 50-55 in 2 days, playing around 2-4 hours a day.
Of course you can sit and over farm dungeons for money. 2-3 Hours can get you more then enough to buy most cash shop parts, even green. Blues take longer, but its still really possible within a small amount of game time.
Im glad i quit and came back now. Its not the best game ever, but ive played everything else thats out and this feels alright.