Not everyone plays cosmoteer the same way. Some people prefer FFAs, some duels, and other methods. I've noticed that it can be frusturating to some people who don't know the game's etiquette to get into multiplayer. The fact the multiplayer scene isn't that large only harms this.
As a solution, there should be some sort of rules list that the host can type into in all hosted games. It would be a simple extra window in the game startup where the host can easily communicate more intricate details about the game. This would be quick to implement, and would do great service for the online multiplayer community.