for all the good thing about valve to say i think that their pre-order beta as a glorified demo thing has been bullshit. specifically the tf2 beta was a bit of a joke in that regard. by doing this they pretty much killed quakewars and apparently the devs decided to stick to closed betas from now on.
"At the same time, with some betas being used purely as marketing tools, some players treat a beta the way they would a demo, and they expect everything to be fully working and polished."
given how quakewars was a real beta and tf2 wasn't i can see where they are coming from.