Increase Key-shard Drop Rates

The drop rate for the key-shards is ridiculously low... players could have stacks of boxes but yet would never be able to have enough keys to open them because the shards just won't drop. It's rather stupid that the best way to actually get ANY key-shards is by playing with friends! Problem about that is that the friends could be playing on different days/times than the others, thus making the players que alone. When playing solo, the key shards just NEVER drop! At LEAST give the shards when the player gets an A+ grade (or S when the chest had already dropped for the player's mastery since they only drop once a week, according to the summoner's profile page) or when someone else on their team gets an S grade. Give the players a goal to work towards with each match they play in, to do the best they can. At least do SOMETHING about dropping the shards more often, it gets rather annoying when you get a high grade (A+ to S) after finishing a match but receive nothing as a reward for it, especially when you worked your @$$ off for that grade. The S grade should at least be an automatic key-shard if the chest for the week had already dropped.