Ability to Exchange 1 Keystone for 2 other runes?
What if instead of getting a keystone, you had the option to choose 2 (Or maybe just 1) runes from another Runes Class. If 1 is too weak and 2 is too strong, maybe it could be 1 1/2 runes, where you get a rune, and another rune with half it's power.
It would add more customization to the new(ish) Runes that have clearly less customization than the old ones. There's so many unique playstyles I want to try with champions that just won't work out as well as they could if I could just get one rune from another page, and I'd be willing to sacrifice my keystone for it.