Nintendo is still reluctant to embrace online wholeheartedly. Wii Wii U Chat comes with the console and it works well, so Nintendo obviously has the technical capabilities to pull this off but because they want everything to be so simple they made an application that is almost worthless on a console.
“Simple” also perfectly describes Dr. Luigi’s online battles. When you choose your mode you are stuck with it. If you want to make any variations to your game you have to sever the connection entirely and one of the two of you has to choose to host a game again. In this case, simplicity leads to making everything much more complicated.
Nintendo has made the process of setting up a game very easy and playing Dr. Luigi online worked flawlessly, but with zero voice chat and no way to stay connected, it feels like the company actually does not want to recreate the “couch” online experience.