It would be nice to have some diplomacy options a la civilization games to make alliances more useful. It would be nice if my sentries didn't fire on allied subs.
It would still allow for backstabs because none of these options would be binding just like funding.
Options that come to mind are:
Cease fire: Allow a period of let's say 24 hours of no connect against another player.
Friendship agreement: Two players decide to become allies and sentries don't fire on them when they come in range.
Some sort of alliance option for more than two players.
What do you guys think?