What a lovely episode.
I saw a fair amount of skepticism across the Fediverse about how musical episodes are always bad and annoying, to which someone would always respond "well, Buffy nailed it." Apparently the SNW writers feel the same way, because "Subspace Rhapsody" isn't just a homage to "Once More With Feeling," it's a love letter. They may have swapped the demon for a subspace wedgie, but they kept the idea of using music to force the characters to confront their feelings about each other, and they even threw in a bunny callback.
10/10. I hope SNW maintains the tradition of a theatrically silly episode near the end of each season as long as it runs!
I've always suspected that the D7 and the K’t’inga are the same class of ship and the differences are the result of a refit, an appropriate mirror of its Starfleet counterpart. It's too bad we've heard Klingons refer to it as the "D7," because if not for that I'd suggest K’t’inga is the classes actual name while D7 is its Starfleet "reporting name."