DIY served its purpose pretty well already. Aside from removing a few restrictions and maybe making the process of making good pixel art easier, I don't think a WarioWare Maker would really be able to expand on it much more. A Wario Land Maker, on the other hand, would be amazing.
Fair point. Its execution could be a lot better. Still, DIY did a good job for what it's supposed to do. A Wario Land Maker game would be something we don't already have, and it's certainly something we would want.