And I don't want D3 being a game where you have to have the perfect 4 person group to beat it. I want scaling so you can beat it (though not easily) solo and with a group. I'm sure a lot of people will make their own one player games. And if they are stopped cause the lack of team mates that will just alienate a segment of the Blizzard game playing community.
yes... if both can be done, great.
But if one player in a 2+ game can do everything, I find something to be wrong :/