Here are my thoughts on some parts of the Discover tab:
In general: I hope it becomes more accessible to non-app users.
Quiz and Test: I've seen many quizzes in English but none in the languages I'm learning. I may make my own quizzes and tests after the current language challenge posts that I make.
Vocabulary: I've gone through some and even messaged on of the creators. It's quite useful sometimes but I'm not sure how to search for more.
I have also created some vocabulary sets. If you want to see them, message me (via pm) and I'll send them to you :)
Podcast: Once I have time, I plan to explore making a podcast. For now, I've seen a lot while browsing and many seem to be interesting topics. This one has potential :)
I think it takes at least two months to form more difficult habits, and longer still if they are even more challenging. Nevertheless, it is a good start. I know from experience that it is hard to do something daily for even a week! :)