Your fam NW / #1's fam NW * (10 + ticks passed in game / 50)
Sound like this formula has 2 parts, one part is different for every family and one part that is the same for all families
[ Your fam NW / #1's fam NW ]
and
(10 + ticks passed in game / 50)
So this mainly prevents big jumps from determining who wins the round.
Though I had the idea that the discussion about who wins the round was more about families fighting nobody all round and saving and saving and then doing one big eor war when the #1 just finishes one and BOOM your on top in size.
I though everybody agreed size was what determines the winner, but that people just disagreed about the way people got biggest in size. But that just a way people play, a new scoring system is not going to solve that.
...meh...