@Talmanian regarding #22: as a lichess user, my desired behavior when I click "Request Computer Analysis" is different than yours. I recall the analysis previously did what you described: it produced long lists of "mistakes" during completely won endgames that were a complete waste of time. My analogy: if I want to improve my golf game, how much time should I spend practicing my 6-inch putts, to make sure they are always aimed at the exact center of the hole?
Furthermore, from the perspective of trying to win a chess game, the thing that matters is capturing the king. In a line that leads to winning the king, sacrificing material is irrelevant. Experience indicates humans are prone to over-value material (such as your queen), but a bug-free eval system should be aimed at predicting ability to win the opponents king. From that perspective, it would be a bug to flag positions based on immaterial pieces on the board.