The bot ratio is a relevent discussion point, however I don't think it's something the average player needs to concern themself with. The fact that our ratio gets changed at all makes our games 100% better than anyone elses because all the other popular co-op servers I know of just set the ratio on 80 or 85 percent and leave it there all the time, regardless of how many players are in the game.
A couple points I probably hadn't considered with the smaller games:
- They will require more attention than the one larger game. This could be the killer of the smaller games.
- Experienced players will have a greater impact on the difficulty of the game simply because it is half the size of what we are used to.
But - these are things that can be worked out I believe. I actually enjoyed spending a few hours in the vanilla game this past weekend. That hasn't happened in a long time . . . . .