One small problem that annoys me is when I build too close to trees, specificly oaks, the branches go inside the building. Of course I can build further away but I would like the option to build right up to the trees. My proposal is to have the trees stop if they are inside a defined area where the house is. It would look like the tree is normal and hits into the house but on the inside you wouldnt be able to see the tree. eventually you could have it done nicely where it looks like the branches are cut or something but this would work for a while.
Also there is a problem with the Big Wooden House and the Wooden House. You cannot get through the right doorway inside the Big Wooden House and the door closes immediatly in the Wooden House.