I won't go into too much detail... in my opinion, a restructuring is needed.
To prevent many from considering this a freebie, the cost of rebuilding a GM level could be increased by 2 units of all resources, and a time cost could be added. For example, a GM is destroyed in one day; on that day, nothing can be built in the city. On the next day, it is rebuilt.
There's a new addition to the skilled players!
A freebie is a teleport/dimension door scroll near a castle, guarded by pigs. That's a real freebie, often impossible to counter...(((
As of now, among the participants (16) in the CIS-2015 competition: the score is 7-4, (43%-25%).

