Trading System
I think Riot should implement a trading system in LOL, we have gifting systems in the game so why not the ability to trade something you have bought or received from hextech crafting. The only negative that could come from this is “bad trades” where someone could say a skin they trade for your skin is worth more than it actually is (rarity wise) but that could be fixed with a simple google search before you make the trade. I believe a trading system would be great for the community too because you could get into a game with someone and have a discussion saying “I got (insert skin here) shard from a chest but I don’t play that character does anyone happen to have (insert desired skin shard here). And if someone does have that skin then everyone wins in this situation. Honestly I do not think any negatives can come from this idea, and it would probably make the players happier all together if this were to be put into the game.