One last one from me if its not too late - got me excited as I drove into work today
a) implications on relationships from the UP voles. Irrespective of the outcome of the majority vote, in some cases the races that voted for and against would have some change in their relationship - if its about banning certain warships - then the relationships should worsten betweeen piecemakers and warmakers, if its about tech or trade then spying or trade embargo's should follow between oppositing voters respectively. Or something more subtle in some cases (changes selected destinations for trade routes for example)

Now the key point - because of the above risk to relationships of voting, there should be an 'abstain' option on the UP screen, This would be fantastic in my view as it would add so much.
Why? When abstaining, you lose the ability to influence a vote but reduce the possibility of relationship damaging events. Tough choices may result as you may believe that the vote is all but won or lost with or without your casting or your influence in the UP may be too small and relationships more important at this stage.
I think this would really 'politicise' the UP and add quite a bit.
Classically the French may abstain from the vote on a second UN resolution for an attack on Iraq. Why? it is thought that by abstaining that they may not antagonise the Iraqi's and win lucrative rebuilding contracs after the war. At the same time they don't want to be seen to be voting against their US and UK 'allies'