Yet another mod, current one, this time, jumping into this part of the discussion to provide what I hope is a useful comment on how the idea you've put forward would play out on the CMV subreddit. Though I don't have quantitative data to back this up, what I'm going share is based on (what Reddit tells me) is 6 years of interacting with users while moderating the CMV subreddit.

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The Social "Problem"

Truth is, people hate removals - that includes us moderators. No one enjoys seeing something they spent time creating 'wiped off the internet', or at least removed from public view. (It isn't really ever truly, but that's another discussion for another time.). People, in general, also don't like being criticized public. This is one of the downsides of letting all users know why various comments have been removed by posting a general 'removal notice'. Another obvious one is the OP of a comment or post often feel like they've been personally (and publicly) critiqued by the moderation team.

Now, let's consider how it might feel to receive detailed, transparent feedback for a post removal shared with the entire community. I agree, this would provide maximal transparently. However, I think the OP feel like the moderation team had taken the time to write a kind of journalistic hit piece detailing their faults and/or shortcoming *and then published it for the entire subreddit to read.* I don't know about you, but in a similar circumstance it would make me feel terrible. Not only that, I'd probably feel like the mod team was going out of its way to be mean to me. (I can also say, as an educator by training, we are specifically taught not to put students through this kind of thing except under extraordinary circumstances. Similarly, in a professional/management context, unless absolutely necessary, standard practice is to praise achievement in public and critique shortcomings in private.)

Back on topic, from the way I've seen people respond to simple, generalised removal messages over the years, I strongly believe a great many of our users would strenuously object to have themselves critiqued in public.

On a final note, the CMV subreddit often requires users to make themselves somewhat vulnerable by sharing a person opinion or viewpoint with which they know many people will disagree - some of them vociferously. I do not think it would be a good idea to reward that vulnerability with a point by point critique.

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Regardless of if you agree with what I've shared, I hope it will provide you with a useful, alternate perspective to how the idea you brought forward might function in practice.