Will there be any trading pacts in diplomacy such as I'll trade w/ you, only if you don't trade w/ x player?
Will there be any agree to stay out of my space treaty?/neutral zone implications?
Survey ship/ collect survey only in my space?
Ship options to guard borders? Helpful, late games especially on larger galaxies.
Will there be a dev stream for the 100 player game?
With the traded resources, maybe if we trade enough resources of a certain type we can build extra habitable tiles? This would be very hard to do early on the game but possibly easier as the game goes on.