I played wow when it was new and had to deal with shitty ass game ruining bugs and downloading a patch to fix a couple of them every other day, WHY THE HELL WOULD I DO THAT AGAIN?! That said I personally decided not to play warhammer because it was like wow but based on an aspect of wow that was just NOT GOOD, which is to say PVP, namely open world PVP. The problem with open world pvp is that there is almost always a way for some douche to come over to your place and kill you a thousand times with out so much as giving you a chance to play, and IF that doesn't happen then what your playing to is a chance to get your face wiped in the floor a thousand times by someone who had a shit ton of free times on there hands and ended up managing to farm up enough gear that you might as well be level one and naked because your going to die just as easily, seriously, try working a full time job, doing school, having a social life AND playing a MMO enough to actually manage to compete with other players(THATS what it means to have a life, not to spend an hour hanging out a friends house every few days or to have 100 friends on myspace >_>)
Hell even if you don't have a social life, a job or any plans on furthering your education then the game would still consist of you either running into someone who's not as far along as you, and you killing them easily, or you running into someone who's stronger than you and them killing you without a fair chance, I mean this isn't a shooter where the game is based on skill, its an rpg, your power comes directly from how far along you are in it...
So really the question is why the hell would I buy a game that is essentially another game that is essentially a shittier copy of a game I already have, I mean seriously, class system isn't anything special, exploration isn't nearly as cool, looks are far worse (I'm not sure if those graphics are better or not because wow has such good aesthetics I hardly even notice its 10 year old graphics unless I'm comparing them to the relatively new Cata graphics >_>) general focus is awful, race selection is nothing to write home about, and it doesn't even have the social benefit of EVERYONE PLAYS IT that wow has.