My comment probably comes off harsher than I intended. But I did not feel like the show ever meaningfully grappled with genocide or any issues related to it. It did not make me think, and it did not say anything I would spend time thinking about. In the end, we got "genocide is bad" from Burnham, which is better than "genocide is good," but her morality sermon came at the expense of all the other characters, including Sarek -- and Starfleet itself. It's absurd, IMO, that they abandon genocide because she gives a two-minute speech pointing out the obvious. Surely those arguments would have been made a thousand times, and a better show would have explored that and not treated it in such a trite fashion.
I'm not opposed to the show tackling serious, even ugly, issues, but I want it to be in a sophisticated manner that takes advantage of the serialized format. The old "last act morality speech that fixes everything" doesn't cut it anymore.