I totally agree that a node based system can create a super complex setup where you can get lost very easily. That is why the better node systems offers grouping and collapsing of branches.
How about the idea to have a node based system and use layers to make the individual nodes complexer as you go. For instance: node 1 contains a noise, node 2 an erosion node. I could add several filters (layers) on node 1 and call it the base terrain. I would love to see such a setup. Not only in your tool but general speaking.
Anyways, I am taking another road now as this thread was about WM vs WC.
I will follow WC 2, looking forward for a demo to play around.