For many moons I've been saying flags should require the flag issuer to give a reason. And now I would take it a step further and say that flags should be eligible for upvotes, which would offer an economic and reputational incentive to flag appropriately, and to hunt for flaggable posts to begin with.
This shouldn't be too difficult, in fact all that has to happen is for a comment (pretty much like any other comment on a post) to be generated containing the reason for the flag. Then that comment can be upvoted. It would probably make sense for such flag comments to be in a separate section at the bottom of the post.
Sounds like we're in perfect agreement with each other. If you want to take part or all of my post that I linked above and repost it, feel free!
It's easy for a quality post (especially from someone new to Steemit like me) to get lost in the abyss of new posts. I think if it were posted by someone with more clout, like you, it would be seen by the right people.