New inspiration runes
I think it would be cool if they could add a keystone rune that added attack range to champs. For range it would have to be based off of base attack range and having champs that have longer range take a penalty. For melee they would get increase in size and hit box as well as some flat health. The purpose of this rune would be to give a little range so you can farm better in a bad lane. I think it's fair your trading some damage or sustain for a bit of attack range. I feel inspiration is the most fitting tree because this could be considered utility which fits the tree.