Lets nip a potential problem in the bud. Champion Essence and its lack of uses
Hextech loot system is for the most part an enjoyable system I really like. Its takes a good while to get keys and crates for free, a bit longer than I like, but complaining about free stuff is rather stupid. So let me do it anyway.
Champion essences and their uses or rather lack of use.
Skin essence is a valuable resource that I feel is really well implemented and I have no complaints about champion shards since they make as much sense as common cards in a booster pack. We don't like them, but they are needed both for business and to make the rarer stuff better.
Champion essence, however is worthless in the long run. Due to how infrequent key shard drops are, how random the drops are, and what champ shards you get, its more practical to ip farm for any champion or outright buy it. And while I get that this is a free rewards program, champion essence will build up overtime due to the prior reasons combined with the fact you can get shards for champs you own, which is a complete waste of a crate. (Getting a shard for an owned skin an't a problem because as said prior Skin essence is more valuable and flexible.)
I'd suggest an CE to IP converter so that we only have one inflated useless currency on league as opposed to two. It doesn't have to 1-1, it could be 1IP for every 3 CE with the final tally being rounded down. That way we can salvage the bad crate opening with some bonus ip.