Looks great, sounds great, plays great. Has rollback. All the new stages are cool and present interesting different scoring challenges. The new characters are generally fun to use even if a lot of their specials dont feel particularly strong. I don't think anyone thought this game was necessary when it was announced, but the additions, changes and new polish across the board more than justifies its existence. As with the re-releases of the first game, I just hope there are still people online to play in a year or two or more. Hopefully also being on gamepass as well will help with that.