I'd like to suggest that similar to the 'consider leaving a comment' on down votes, that for close votes on posts by new users - those voting to close be more strongly encouraged to leave a comment. Or perhaps even go so far as to not allow certain close reasons on very new users for the first few minutes.
Especially in cases where the question is unclear or incomplete but could be recovered by editing. Votes to close can happen very quickly before the OP is given a chance to fix their mistake and they aren't able to see why until after the close if no comments are given.
While the close reason itself would be the 'comment' as it were:
It's difficult to tell what is being asked here. This question is ambiguous, vague, or rhetorical and cannot be reasonably answered in its current form.
The rapid closing of questions by new users is undoubtedly demoralizing and can make the community seem hostile. So I'd like to suggest that new users be given more leeway to fix mistakes before the close happens.
You should add it as a comment- I disagree. Often lends to undesirable behavior.
People have become too impatient for great questions.- sadly, most of the great questions have already been asked. These days, most of what gets posted to SO (at least in the tags I frequent) are either duplicates or too localized (didn't RTFM or had a typo).