I just don't want it to end up like other games lately which gets the shitty port treatment just for the sake of extra sales. Blizzard is notoriously anal about polished gameplay, which is why I don't think they would sacrifice game play for the sake of profits (at least not yet anyway).
Also @narg, if you do the year prepay AND get the D3 CE, your WoW account will get a credit for the D3 cost. This is something they mentioned to help those OCD people who must have that new mount and must also have the CE stuff