well no shit isn't that what are you doing in action rpgs with less depth?
In my opinion, gameplay is much deeper and funner in a game with dynamic combat as opposed to a game where combat is like WoW's. You've got it reversed. In an action MMO like Dragon Nest, you still have to factor in just about everything you listed- skill trees, consumables (buff potions and healing potions alike), skill and CD management (So, SO much, because if you don't, you are utterly fucked), movement and kiting (because you're moving nonstop regardless of class type), and "cooperation," which ranges from "setting up" enemies (another somewhat vague term that you'd kind of have to play the game to understand), protecting characters with lower defense/health, synchronizing skills and debuffs (of which there are many), and so on and so forth- but the actual gameplay looks and feels much different than any WoW clone. At least, it is to me, and I've played both WoW (albeit the "up to level 20" trial thing) and a good deal of WoW clones in search of a good MMO.
and on that note if both players know how to play doesn't it depend on who has better stats?
I'm referring to the game mostly in the cooperative Player-vs-Enemy sense. If you mean the PvP, well, typically a PvP match is fought with "balancing" on where every class has a standard amount of HP, MP, attack, et al, and it comes to down to nothing but skill, especially if you have the same class as your opponent. Sometimes these matches can get pretty heated. By sometimes, I mean every time. "Heated" is a severe understatement if you're talking about Asian players, mind.