I'm definitely interested. In regards to Multiplayer games that are not Last Species Standing, why not simply have an agreement before the game begins that the allies can decide who the official winner is, instead of being forced to fight one another?
In other words: Three allied players win the game. Player A was considered to be the most instrumental player, B the next, and C had just a minor role (one of those players in the corner who helps with tech and resources
Then C resigns (turns his empire over) to B, and B resigns to A.
If I understand the scoring correctly, Player C should still gain points in his/her/its rating, but just not as much as Players B and A.
When there is a disagreement as to who did more in the game, there is still the Last Species Standing option.
Just my two cents