Aryeh Gregor writes:

"There doesn't appear to be any option to disagree with the editor's
handling of an issue but not escalate it to an issue.  People might
not want to escalate to an issue because they don't think it's worth
the time, for instance.  I suggest that an additional substep of step
5 be added allowing commenters to add the Disagree keyword immediately
if they don't want to reopen or raise as an issue, but still want to
express their disagreement."