If there is an immediate problem here, it's the reward system. If one has to do these Expert Recipes to get a good rank, and if getting a good rank is required to actually get a reward (and we still don't know what will be given yet, do we?), then it's a really stressful thing to do while fighting the leaderboard. The idea is to be REWARD-driven, not STRESS-driven... Imagine how you feel when you suddenly get kicked below top 10 on the very last day!

I don't think rewarding the Top 10 or 20 is as important as the idea of rewarding whoever getting pass a certain score. I mean, it's OK to reward the Top 10 as well, such as given a title. But we do need a MUCH better reward for players who get pass certain scores with Expert Recipes! That will provide an attractive force for people to do these Expert Recipes.