There's probably several things I would like to change, mostly attraction related, but since it's the season... I have a problem with the lack of Christmas theme in WDW. They do have Jollywood nights and the Christmas tree up at Magic Kingdom, but California overhauls the Haunted Mansion to Nightmare before Christmas. You could make the argument that Haunted Mansion is better than the overhaul, but it's just a nice little re-theme to experience when you go to the park. The Guardians Christmas remix got cancelled after the first year, and I didn't ride it so I wasn't able to experience "Run Run Rocket". I'd just enjoy for a little more Christmas spirit inside the rides and instead of just some lights. Now, I do understand why WDW does that, mainly because the park is more touristy and popular than Disneyland, where it's more of a local park. But many guests probably go at Christmas time to experience Christmas, call me a Grinch but something needs to change. I would love for them to bring the Nightmare Before Christmas overhaul come to Magic Kingdom and for the Cosmic Rewind Christmas Remix to come back, even if it's only "Run Run Rocket". I also think that theming the World Celebration hub to Christmas time would be cool to see, and it's literally called World Celebration and people all around the world celebrate Christmas. World Showcase should also be able to show and express how people all around the world celebrate Christmas differently. You don't nessacirly have to put Christmas into Animal Kingdom, the park is focused on animals and that should probably be a driving point in the park. They should definitely theme Galaxy's Edge to life day though, I know that the land takes place in only one day canonicly, but Life Day would be so cool to see, the rides don't even have to be Life Day themed, just the land.