In the lobby if you click on your head (in the hotbar) and then click the diamond you will see the three levels of daily challenges. They offer XP, Cubelets, and points. The challenges themselves are a bit more basic than what you have suggested and mainly consist of 'win games' or 'get kills', but it's the same concept. If you really want more complicated challenges like you alluded to, I think you should make a new post about a revamp to daily challenges directly, but personally I don't see the need. The challenges are good as they are IMO and are difficult enough to provide a challenge, but easy enough that you can finish all three in a very reasonable amount of play time.