If you don't remember Mickey's Once Upon a Christmas, they had this plot about wishing for Christmas every day, but with Donald Duck, Daisy, Scrooge McDuck, and their nephews Huey Dewey and Louie. The only core difference here is that it's Mickey Mouse with the sensational six all together, and he gets the wish from a fountain instead of a star.
Other than that, this Mickey Mouse Christmas special isn't really a bad one, but nothing original either. My only other issue is that it feels like it's aimed at a younger audience once again just like the last few Mickey Christmas specials that came on Disney Channel, but I will admit this one feels less like a special that belongs only on Disney Junior than the others. It's not as bland and childish and has some heartwarming moments. I'm not a fan of the songs, but the CGI is also fine.
Overall, as an adult Mickey Mouse enjoyer who enjoys the older hand-drawn modern-classic Mickey projects like Mickey's Once Upon a Christmas, House of Mouse, and Three Musketeers, this definitely could be better, but it could also be worse. I just think Disney needs a new team for anymore non-preschool Mickey Mouse content that isn't made by their main studio.