Ok i been mulling around and thought of something that i believe could positively change the face of kaw as we know it. New building type: siege buildings. What are they: buildings that prevent spy or atk sttempts till 0d. A better explaination is like having a moat or wall or even unpassable territory that first must be dealt with prior to actual attacks on your barracks or castle, New atk type: siege atk. A type of atk that can only be effective vs siege buildings such as amobile bridge tree cutting a tower siege engine etc. Now what this would do to change the face of kaw is simple. Would make it harder to just take gold from someone. Anyhow i know there shall be trolls say what you will. Enjoy!
Or you go along with existing mechanics and build towers to prevent attacks. But that would be logical- might as well make a new building!