At least the characters and mechanics are getting worked on, though.
I finally decided to start up Mario Tennis Aces again to check the last update they did to the game. As expected, they have not fixed the biggest problems with the game menus and options available.
Besides the much needed gameplay balance, one of the things that Mario Tennis Aces really needs are new game options, specially when playing offline. Like I said in my Quick Review a while ago, the game barely has any content and it depends mostly on the replay value of its simple online multiplayer. And the little content that it has is quite complicated and confusing to configure the way you want. Sadly, the rushed updates clearly indicate that the game was released incomplete, similar to how it happened to Mario Tennis Ultra Smash.
While the Online Tournament Demo was going on and a few days after it finished, I noticed that a lot of people were commenting and excusing the connection issues by saying that this was supposed to be a network stress test and not a demo of how the game really would be. Actually, though, the Mario Tennis Aces Online Tournament Demo was just an advertisement. It was never intended to be a stress test and probably never used as one.