I assume the Meta is the correct place to ask such a thing. I hope the question itself is generic enough to get an answer that isn't too specific to my example, but I think I can better explain it using my example.
A while ago, I asked a question about blowguns, which in retrospect was quite broad, but as comments and answers came in, I started to realise that the part of the issue I had with blowguns was only a very specific aspect of what I had originally outlined - the martial proficiency.
I tried to cut the question down, but by that point, it had already gained a lot of clutter (although some of the comments have since disappeared) regarding various answers to the original version of the question, and the question itself still containing details from the original version of the question (since I didn't want to render any existing answers completely irrelevant, especially since they helped me realise this one aspect that I didn't like).
So, I want to ask a new question about the martial proficiency aspect specifically, ideally with a designer-reasons tag, since I think that is the only way to get such an answer. Although I'll probably reference my old question, the new question will ask only about this one aspect.
Should I ask a question that is a refined version of an existing question? Or more specifically, should I ask this question about blowguns that is more specific that my previous question about blowguns?
If anyone has an opinion about if I should ask this specific question, I assume that's fine to include in the answer, but I'm guessing it's best for a more generic answer to be included as well (for example, someone might answer with "Yes, that's alright to do generally because ... but no, the specific question you want to ask about blowguns wouldn't be good because ...")? However, I'm obviously not expecting answers that talk about blowguns or proficiencies.