that's like your opinion man. There is a lot of people who feel satisfied with the game... even with all the faults. It is worth the money and DEFINITELY feel finished.
Of course it is my opinion, that is why I’m here to share it. And I don’t think I’m the only one who sees the problems of the game. From an unfinished World Builder, to a AI incapable of playing domination, to a terrible WC and Religious game, to a repetitive tech progression driven by bonus, to a shallow design built on the only principle of piling number modifiers, to game modes the AI simply cannot play.
Though I give you that pointless game systems do not make a game unfinished. I certainly would never say that what it is primarily a competitive single player game is finished, if only the human player can compete in some of the game modes and victory conditions.
But, of course if your opinion is that 6 is one of the best games of the franchise, you are entitled to it as well.