Changing Secondary Runes is Not Intuitive!
Changing the secondary tree runes doesn't do what I expect. For example: My top rune is Cheap Shot (Tier 1) and my second rune is Ravenous Hunter (Tier 3). When I change Ravenous Hunter to a Tier 2 rune, Cheap Shot is removed and Ravenous Hunter is bumped into the first rune slot. It would be more intuitive if the rune you click is always the rune that you're changing. Instead it's swapping runes out in a confusing way.