You need to read more posts too, everyone in this thread is saying reducing kingdom size doesn't change the game tactically because it scales down (I contend it doesn't).
You don't? Consider the following, if we reduced kingdom size to 1 player per kingdom; you can bet your ass there wouldn't be a single player that wouldn't be in an alliance. 1 player kingdoms might seem ridiculous but it is the endpoint of a recursive thought experiment where you can see all the consequences of reducing kingdom size.