Sure, a team can vote if the sum of votes of all team-players is greater than 0 (at least one team-player is a voting or a full member).
So the bug allows full membership for the player-less dummy-team without it being a voting member.
Full membership (AP) for a
player requires state religion = AP-religion and
loyalty (no recently defied resolution).
Full membership for a
team requires full membership of all its team-players.
Appart from the dummy-team-full-member-bug I consider this logic and its implementation all right.
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The grey culture is Byzantine right, although it appears quite bright, but not as bright as German. -> Cataphracts?
The +1 for times of peace needs 60 turns and the counter gets set back to 0 with each DOW ...
Hatse has 1 Iron and 1 Ivory to trade away (Samurais and War Elephants) and appears really strong overall (8 cities!).
It seems the strength of our opponents increases proportional to their distance from us.