Hextech Crafting needs some work
Getting a champion shard for a champion I already own.
I wish I could reroll it for a skin shard, at least those I'd potentially use. 
Wouldn't it also be possible then to get all champion shards? If you have all the champions hextech crafting is wasted on that account.
I should note that this chest was one of the 'free' ones you get for getting an S rank in matches. So i'm already down 1 potentially useful chest.