Interesting mechanics, but becomes repetitive in long run.
PvP is rather standard boring stuff as usually you don't know the level of character you are matching against (except the more known experienced characters that are well-known), and the character level and equipment makes the real difference (the choose of skills and strategy being rather obvious quickly). So you win or lose at random, no much playing value there. There is also no in-game reward, except some fame maybe, so only bullies might like that, slight exception if you race with friends in character progress or equipment development. Clan-wars are the same PvP stuff just more extreme deviated, as one clan comes to war with 10 lvl-40 characters, versus 3 lvl-30 characters from the second side, so you already know the result, no fun there for losing side.
Finally nations (there are 3 unchangeable nations to choose from at the very beginning): it may be fun to jump on someone who comes in the wrong corner or go for crusade to other country, but the overwhelming hate that is related to this concept is rather depressing in long run. Finally: are we all men or frenzy animals? The game-creators concept is rather obvious in that matter. Languages concept (quite interesting alone) do not help to communicate with foreigners, but it provides feeling of frustration that is very reflective: is it just like that when real nations cannot effectively communicate each other? An excellent Russian movie comes to mind, where Russian man, German man and native Czukcza (Siberian native) woman are trying to live together during WW2, speaking three different languages, their converations are masterpiece misunderstandings.
Quests are not really innovative, but give a strong boost to character experience development, especially on later exp levels. Here where it goes really bad: from some point you know more/less all the mechanics, monsters and concepts, there is no real point in the game anymore, except "exping" here, "exping" there. Quests became rare as they are level dependent but going up to next level takes more and more hours of useless butchering.
Then you say to yourself: what is the real added value that the game gives to me _now_ and the answer is NONE. So: finally you manage to drop this time-waster and the only proof of your weak-will (slightly going to insanity) is the game built-in time counter that says like 50 000 minutes, that you can hide from your relatives but unfortunately not from YOURSELF. What I would happily save others from...