I think this is important to keep in mind.
We do not want to encourage nationspam.
Though I think making it score based has its merits too, in that case both econ (cities & Infra), long term big projects (Projects) and well militarized nations (Militairy score) will have more "votes". In my humble opinion this would make it more realistic, a country with 500 Nukes (even in real life) has a lot of pressing power. This might also encourage (depending how well the organ functions and how much influence it has) nations to have more militairy during peace times, a kind of money sink, something that might maybe slightly change the Meta.