I'm always up for a musical episode, and I've been a big advocate of MMC on exactly those grounds, and I'm very glad they did another musical.
But I don't think the songs hold up as well on the whole this time, and I don't think this ep carries the same emotional weight.
Best songs are "Pinkie the Party Planner" and "The Goof Off." The first is a great "Good Morning Baltimore" style setup, with clever parts for Diamond Tiara, the Cakes, and others. The other has all the funniest bits. I loved Cheese swiping "Smile" and Pinkie breaking into frantic Spanish at the end.
The rest of the numbers never really hit. "Pinkie's Lament" and "Cheese Confesses" raised zero feels, and songs like that are usually a sure bet when it comes to emotional punches. (Though admittedly "Find My Way" did a crappy job in this role too.)
This episode was light and funny and cute, but it was never
sad. That would have made it feel like an episode that mattered.
(Also they need to stop rhyming "Pinkie" with "eee" sounds already. When the stress is on the first syllable -- PINK-ie -- you need to rhyme the stressed syllable too. Like, I dunno, winky? Stinky? Twinkie? If you can't think of something then don't use a word like that. When you only rhyme the unstressed sound and then the singer has to sing it like "pink-EEE," that's amateur hour, son. I swear to god this has been bugging me since Applebuck Season and they did it like 3 times this episode.

)