For a new resolution list, what about one which has Civilians in mind? This could open up some new policies open to everyone, that could be enforced here.
Effects such as faster sublight speed within trade lanes, partial open borders to civilian ships, no hostile actions to civilian ships in a war (these last two might not be possible, not sure), and sparing them during a war, so nothing higher than Indiscriminate bombardment, and don't let devastation get too high.

The opposite would see no enforced civilian borders between GC members, Piracy risk is decreased and/or Trade protection is increased per system. Empires which trade with non-bordering Empires could get a debuff like certain additional costs. And there aren't rules against bombardment or firing on civilian vessels.

I might also look into making trees mutually exclusive, so you have to repeal one to get its opposite, no clue why this isn't in the game already.

Hmmm, I really like that idea and it'll give me something to work on as a break.