In a recent question, a comment was made regarding why a question was altered. I thought the idea was productive and a great idea-another learning experience not easily given by a different question. Should this practice be encouraged (added to the Help Centre information)? True, that when making an edit, there is ample space to give reason for changes and edits; but, this must be searched by pressing the "edit" history. Even then, the reasons might not be entirely clear to the questioner (who might have superficial understanding of the subject involved.)
In a related issue, shouldn't all first down votes be defended in comments? (This is only noted as related due to specific reasons for DVs are covered pretty well in the suggested criteria for down votes.) Often, though, the questioner is confused as to why specific DVs were "awarded."
Related (not my question - used it to make my question clearer): What is a good comment to leave for closed critiques? Others?