They really shouldn't have called this a beta. Its so obviously early stages of an alpha but calling it a beta helps shift units better I imagine.
I mean beta usually indicates the full product will be out at some point within the next 6 months but there is no way in hell they are adding another 5 maps, linking them altogether, building a class system (bear/usec is pointless at moment), adding hideouts and bringing in auctions/flea market within that time (plus all the other stuff thats required like optimising maps like customs and shoreline).