Another idea would be to allow the player once to prelong the quest for some minutes, maybe 15 or 20 as it is in my opinion no really great experience when you are shortly before filling one more chests, maybe you need only one win and than the time run out. With the former reward system this was in another way, their you really could play till you have all neccessary wins not important if this happens in the 23 hours or only afterwards.
Another idea would be to allow the player once to prelong the quest for some minutes, maybe 15 or 20 as it is in my opinion no really great experience when you are shortly before filling one more chests, maybe you need only one win and than the time run out. With the former reward system this was in another way, their you really could play till you have all neccessary wins not important if this happens in the 23 hours or only afterwards.