The only concern I have for new Rune system.
The base Armor and MR most people run in seals and glyphs. I only saw a few slots so I am a bit concerned as to what will happen.
Defensive stat boosts across champions? While a decent solution it would homogenize certain playstyles for those who like to go glass cannon in the runes. Some insight on how Riot intends to go about this will help me not have many sleepless nights.