Olaf's Frozen Adventure finally aired on TV the way it was meant to, clearly as damage control after it was shown before Coco to much vitriol, and I enjoyed it. As a character piece focused on the snowman, it works well, and we even get some more bits and pieces of Anna & Elsa's past. Really wish Marshmallow the snow golem from the movie and his dozens of little siblings from Frozen Fever got some screen time, though.
This really doesn't deserve the hatred in and of itself, but I do agree that as a short preceding a major picture, it was way too long. Personally, a Zootopia Xmas special would have been nicer, but oh well.