I've recently had a question put on hold, and in retrospect, I can see how the people who put it on hold would have felt compelled to do so, and I don't want to argue this specific case.
But I do feel as though if there was a place that I could have put the question first, it could have saved a lot of time and the embarrassment of having my question put on hold. I wouldn't be looking for an answer there but just advice on how to make it a better question.
I also see questions that are poorly phrased, with horrible syntax become sorts of roast-fests for the asker, and while I can't find an example right now, I'm sure other people have seen these too. I cannot believe that anybody truly means to put out bad questions, but often, I find myself deleting drafts of questions on weird phenomenon just because I don't know the jargon or how to state a certain piece of logic.
While for the creation of this editing place, I do have to voice my doubts, since it will likely become a place of horrid, unworthy questions that people put no thought into simply because somebody else will make it a formal masterpiece for them. I also believe that it will be a place that most questions are answered, since in a lot of cases, it'll be easier to simply answer the question rather than fixing it.