Maybe its a fun idea to add a server where the selection of the best builds in all the servers are. So for example when you build a really nice castle and there is a staffmember in your server online, you can ask them to put your build in the server. When the staff memeber thinks your build is awesome then they can copy it and put it in the server. The player who made that castle will get some rupies and his name will get a color (a color thats not used yet). This way everyone in every server will get a goal for himself if they want to get in the server and you will get an awesome price.