I see some people saying that the population will be split, thats true but the split will only be people who aren't interested in pvping, so basically your argument is you won't have as many people to gank. Wouldn't you rather have a server with people who are interested in pvp? isn't that the point of competitive play?
my suggestion would be to scrap the idea of making a burning crusade server because corecraft is going to hog up all the fame anyway and put those resources into a pve server, there's no contest so you'd be hogging up the fame for that