I've seen many questions asked in the Area 51 Discussion Zone which are essentially proposing the idea of starting a site. It would make sense to me to have a custom close reason for such questions, saying that there's no reason to add an extra layer to it, and to just directly make the site proposal.
1 Answer
A solution for this is already in the works. I am in the process of rewriting the Area 51 FAQ and introductory material, which will be followed by a canonical Area 51 meta post entitled something like, "How and When to Propose a Site".
Posts of this nature (unless accompanied by a very specific question beyond "Do we need a site about {x}?") would be closed as a duplicate of how to actually propose a site.
No completion date yet.