I'm not convinced this speaks to how that queue should be used, even if it would be useful for how it is.
I only really do reopen reviews on two sites, sites I know extremely well, so maybe this doesn't hold up in practice, but as we all know, a question should stand on its own merit, without the comments or any notes being necessary.
Once a question is closed, I see three basic paths it can take:
- It shouldn't have been closed, in which case reopen voters should be able to read the question and know that it's reopen-worthy without any extra feedback.
- It should have been closed, but it's been sufficiently edited, in which case the same is true.
- It should have been closed, and it hasn't or can't been sufficiently edited, in which case it shouldn't be reopened yet. The only notes I can imagine seeing here are "I know this question is unclear but I get it and I think I can answer what they were trying to ask" (something I've seen a number of times), which means they should perform the edit.
The major flaw in my argument here comes, as usual, with robo-reviewers, who will just assume "since those people felt this was close-worthy and nothing's changed, it must be!" But I don't think ad-hoc comments are the solution to that problem, and I like to think we have enough users floating around on each site to avoid statistics on that.
The only remaining value, then, is teaching those who voted to close a question that shouldn't have been closed, and I'm not sure this is the most efficient (or risk-free, referring to that off-topic commentary about how "I could answer this") way to address that.
Mightn't it have a similar impact to just notify someone if a question they closed got reopened without edits? That would ensure they were always informed, rather than just when someone really felt like it, and it would avoid the risk of people harassing voters without support of other reopen voters.
I don't mean to make that as a super serious counter-suggestion, as I haven't put too much thought into it, but my point is, I'm not sure this best-addresses the problem set out to fix. In an ideal world, it would be great. But knowing how systems like that occasionally get misused, I'm just not sure.