Here's my one-line, non-spoiler review of Star Trek: Strange New Worlds 2.9, which was, literally, an operetta:  I liked a lot of it.

[Spoilers ahead ... ]

Here's more:

I thought the story was excellent, ingenious, and original: the Enterprise encounters some kind of force-field that has the effect of making the crew put into song their most personal thoughts.  The addition of the Klingons added more tension to the story, and their actual singing number was pretty good.

I'll get to the singing of our crew in a moment.  But sticking with the story, the resolution, of sorts, of the romantic attractions/relationships of La'an/James T. Kirk, and Chapel/Spock was powerful narrative, and fine writing and acting, but I would have rathered see both relationships go in a better direction.  In particular, James T. Kick didn't have to be already involved in a relationship with Carol, who is pregnant, and Chapel need not have seen her upcoming time away from the Enterprise as ending her relationship with Spock (though, I suppose, maybe it's possible that she doesn't).  As I've said before, I'm a hopeless romantic.  And it was great to see James T. on the Enterprise, in any case.

Now as to the songs.  I thought the singing and songs of Una, La'an, Spock, Chapel, and Uhura were top-notch -- not only in and of themselves, but working well in the story.  The rest were ok, but at least to my ears sounded at times like a parody of an operetta, whatever exactly that means.

I'm not the biggest fan of Gilbert & Sullivan, anyway, though I think The Who's Tommy is great, and I always regretted Paul McCartney saying no to the story he had asked Isaac Asimov to write for a musical McCartney had in mind.

Anyway, on balance, I'm glad I saw this episode of Strange New Worlds, and I'm looking forward to season 2 final next week.  And hats off to all of the singing crew, who actually sang, and had fine voices!