So this was a perfectly serviceable episode, I've rated it a 6. I don't mind a Beach Episode, feels a bit too early in the season for it though, but it is what it is.
The God tier: Uhura's outfit, Una's singing, Melissa and Martin's chemistry
The Good: Anson in the tattoo scene, Spock mind-melding with a plant, Spock being inebriated (as you can see), Ortegas and Scotty's making-up scene in the shuttle
The WTH: La'An's "journey", Scotty's severed thumb
I'm glad we've finally got an Ortegas episode (I know it was a Scotty episode too but he still feels like a supporting character to me) that's more than just "I'm Erika Ortegas, I fly the ship". Melissa and Martin had great chemistry and I'm glad they both did subtle hangover acting instead of overdoing it. On chemistry, the bit where Uhura was touching Ortegas all over her face clearly shows how close the cast are and how comfortable they are doing scenes like that. I expect that scene took many many takes to complete because everyone was probably cracking up.
The pacing was all over the place though. They're only at the resort for, what, two-thirds of the episode? And most of that is Ortegas and Scotty going from person to person in single locations. Felt like I was just watching an RPG. There was absolutely no urgency with the bomb. It's a bomb, it's attached to a crew member, if the bomb explodes it'll take a crewmember with it and half the ship! If I was Ortegas I'd be calling red alert rather than just casually ambling off to find the captain.
Despite the actors' performances, Ortegas and Scotty's mutual dislike doesn't feel like it's developed for long enough to warrant this almost-coming-to-blows plot. Another casualty of such short seasons, much like Spock and Chapel's big breakup in Subspace Rhapsody after they'd only been dating like two or three episodes. Compare to Reed and Hayes' rivalry in ENT S3 that had been brewing for most of the season before they had it out with each other.
Didn't care for Scotty's severed thumb, it felt like I was watching a live-action Family Guy bit. I don't know if La'An's plot is supposed to play into her larger arc that's being set up for this season, but in isolation in this episode it felt cartoonish and Christina overplayed it.
Nitpicking: Kirk was vacationing on the same planet and decided to stay in uniform the whole time? OK then. Alpha Shift consists solely of characters in the opening credits? I saw "It's green" coming and it wasn't cute.