Most of the World Creator images I saw had little color or detail, and most had bits that were un-proportional.
I think I know what you mean but I think that's a usage problem rather than a limitation of the product. The website owners don't do themselves many favours with enticing users as it's a bit of a mish-mash. However, I think it could be used to create a tileset and buildings similar to the above but tricky to say if that's not what you're after.