some nice ideas in there, a lot of it sounds like fairly standard mmo fare though. also, it sounds like its very heavily instanced? well, that can work both ways i guess.
i think the instances in wow work well (though some people think there shouldnt be any), but i think that the instance system in guildwars and DDO make it play like the multiplayer section of a single player game - like diablo 2. you all meet up in an inn, and then head off to an instance. theres no interaction in the world with people your not directly working with.