To be honest I would rather the game didn't use a p2p network structure nor be aimed at being massively multiplayer. I would think a game that you can invite people to play with you in that you then become the host server and ultimate authority would give you all the multiplayer you could want with none of the downsides of p2p.
In that way you could perhaps have your own servers for like minded people to join and play ran by someone else.
Will features of greater interest to solo players be the focus of 1.3, now that both 1.1 and 1.2 have focused primarily on MP stuff?