Thanks for the feedback guys. I know it seems a bit empty, maybe I have to restart the terrain, as I'm not really happy with it. It's kind of hard to paint snow terrain, because you can't really see any height difference in all this whiteness. I know that I should prettify it by adding more visual fluff.
About the ladder spam...I don't really know what to do against it. It seems that currently, small enclosed spaces can just be expoited. I purposely tried to build only a small castle, though, because I'm going to use it on a smaller LAN-party sometime. Defenders all spawn in the inner castle. Perhaps they don't have enough time to defend against a horse rush to the first ladder. This could be changed by moving the ladder somewhere else.
Maybe it's too much to be asked, but it would be cool if one of the cRPG servers could host experimental maps from time to time, because game balance is not really something you can get right when you can't play it with 50+ players.