I just posted this story Frozen short REMOVED from Coco screenings: Audience backlash forced Disney to Let It Go? and have to agree that the Frozen short was very disappointing. I went in looking forward to seeing it but after a short time I just wanted it to end so Coco could start. Not much of a story, too many songs crammed into a short space of time, it felt like a clip from a direct-to-video sequel.
But Coco was great, I really enjoyed it.