It would be great if you could customize limitations on alliances in the game creation settings. Such as: limiting the alliance member limit to two or thee factions instead of four. Or disabling alliances altogether. 


Maybe a separate idea but it would also be great if all factions involved could be consulted before a new faction was added to an alliance. Somerimes in single player games, a CPU that youre allied with will just start randomly inviting other factions to your alliance whether you agreed to it or not.