I went with 10/10. The epilogues pushed it up and over into great territory, especially M'Benga's.
Without those, it would have been merely an episode that significantly outdid all the various Berman-era episodes that handled what was in broad strokes the same core premise.
Focusing on the difference between this episode and the vast majority of all Berman-era episodes a bit more, this episode had significant literary themes and character dilemmas that transcended the plot. In the end, it was actually about multiple things far beyond simply solving the puzzle box of the week. The question, "Is this person who breaks the rules we impose still a good person?" is a universal one.
Returning back to the rest of the episode, what differentiated it from Berman-era Trek is that it never belabored the obvious. Rather, it kept moving and piling on the twists, and it was willing to leave the resolution of many of the twists until after the climax had passed.