Existing questions and subjectivity
Subjectivity in a stack exchange site isn't a problem; we know (more or less) how to handle subjective questions. But the example questions on this proposal all look to be in one of a few categories:
Brainstorming or "what if" questions that will result in people throwing out ideas. Brainstorming questions don't work well on Stack Exchange sites, sine there's no single answer possible.
Questions asking people to research something. While these can be definitively answered it would turn the world-building proposal into a site of research questions, which isn't the point. (Note that a lot of the upvoted questions fall into this category.)
There are also a few questions about tools. For example, What software exists that can simulate plate tectonics and erosion to produce a detailed world map on a non-Earth world?
One of the toughest things the Worldbuilding proposal is going to face [...] is the fact that it is creative in nature.
Going forward
Most Stack Exchange sites encourage question types that will benefit future visitors, and discourage ones that won't. Creative questions can work on Stack Exchange sites, and I think there are better example worldbuilding questions that can be asked. To flourish, this site needs to define itself with questions that are:
- Specific and answerable (note that this does not mean they can't be subjective)
- Not just research questions that could be asked on space.SE, history.SE, Writers.SE etc
- About worldbuilding (of course)
So how do you ask a question about worldbuilding that will work?
To work, this site will have to attract a certain kind of polymath. Let's play to their strengths and also look for questions that will be useful to future visitors.
Don't ask what to do when building a world, ask how to do something. Don't ask a research question, ask how to research something or where to research it.
Research questions
Worldbuilding pretty much requires creative invention and research by definition. Research questions are going to be asked on any worldbuilding site, so this proposal shuld expect them. The Writers.SE meta policy on research questions may be of help here:
I'd say some of these are on-topic. If you consider them questions about resources. Like the one about the blacksmith could be answered with references to sites/books containing such info. Likewise for the other questions.
Then we don't give the asker a fish, we teach him how to fish. ;-)