Watching this episode and then looking back at the season and considering the apparent upcoming Muppet episode, I get Thor 4 vibes. Yes, you took some risks with Thor 3 and it paid off, but I didn't want THIS.
Una not being able to control herself around Doug is just dumb and not given any explanation. It is just being silly. Granted the after credits scene is really kind of a gag reel, but everything Spock tells him could be looked up. That's the merely silly. Working a ballroom dance into a mind meld, bleh. The constant jokes about Spock being only half Vulcan I actually found funny.
I can JUST stomach the idea of a treatment that turns you genetically into an entirely different species and yet you are still just a version of yourself. Okay. It's science fiction, not science. But you don't act like a Vulcan because your DNA became Vulcan and it doesn't restyle your hair, which isn't genetic. Turning them into untrained Vulcans would be a disaster. The whole episode acts like being logical is genetic to Vulcans, but it isn't. They work hard to learn that and control their emotions. And that just wrecks the entire premise of the episode.
And I am so weirded out by Kirk showing up every day.