Yes the intro was a bit lackluster to me up until "All Is Found". I understand what it's like to not spoil a movie lol You did great. Having seen it twice, Some Things Never Change had that catchy melody but only in the chorus. And being a Broadway fan, I did get Olaf's song and found it delightful lol. Lost in the Woods worked with the 80's Phil Collins vibe
The rest wasn't really memorable. Olaf did save the movie in that he was entertaining but they also gave him a great plot. Having him be more educated due to reading was awesome. I like it when the sidekicks do more than just plain comedy, which is why Timon and Pumbaa worked for me in all the movies.
The scenes with Elsa and the water nokk were stunning to see.