It would be nice to remove the daily restriction from study plans so someone who wants to do more than the allocated questions/problems per day could actually complete the plan faster if they so desire. Let's face it, if we the goal is interview prep and the time is of essence, people are unlikely to limit themselves to a couple of questions a day. Of course, this is not to say that there's no way to do more questions from the study plan ahead of time - therefore why gray them out and make them unavailable? It's just a nuissance that serves no useful purpose. Also, it would be nice if the plan progress would update after a submission. Right now one needs to constantly reload the page to see where they stand.