I am not comfortable with the way rulers will (might) be chosen, someone with no interests except his own (or a troll, or an alt from an opponent nation) could (I said could, it'd require luck or an incredible amount of skills to achieve, I'll admit) become the most influential land owner of a nation and therefore ruining the whole diplomatics relations of said country for his interests/his main nation's interests (there were traitors, even in governments, in real life, but it wouldn't fit well in a game).
My proposal is as follows : CLANS are elected as rulers of ports, not individuals, and representants of said clans (either their diplomats or their officers) would earn ruler/parliament seats. amount of seats earned by each clans would be determined by the amount of ports they own (50 seats, clan X controls 20% of all nation's ports, they get 10 seats (20% of total) and have an option to elect a fiendly clan's representative if they only wish to have 7 representants in the parliament) It would of course still give advantages to bigger/more powerfull clans of the nation, but it would already eliminate the risk of a troll/alt having too much power in a nation. The way the ruling clans of a conquered port would be chosen is still at work in my head though, but ti shouldn't be solely on a value that is determined by a number factor (I.E. :if a clan has 20 members all sailing the most powerfull ships in every PB (as AFAIK, PBs are limited to 25 players), they would own all ports.). I am open for suggestions on how to chose which clans receives the harbor control, maybe the POTBS system would work, at least for a time.
Also, it'd be really helpfull to have a port ownership transfer option when this goes live.
PS : hopefully everything is understandable, I'm never satisfied with my proposals and add stuff while I'm typing, I'll gladly clarify shadowy points if it's needed. Also my English not being perfect, I hope you'll get it