We need an exchange for Orange and Blue essence.

I'm probably one of the very few people who never spend money on this game. And because of that, I don't really care about skins that much. But it seems that Hextech Crafting only wants to give me skins. So then I just have a stockpile of orange essence. And I'm the kinda person who likes to show how much I mastered a champion.

So can there please be something implemented where I can exchange all this orange essence, that i'll never use, for some blue essence? Or even vice versa? Of course this wouldn't exchange the exact amount you put in, there would have to be some exchange rate. But that would be nice if we could get something like this.