@Riot, a goal for you guys for 6.2.

No AD Carry, bar maybe 1 or 2 fringe cases, should want to be running the Thunderlord's Decree Keystone. It would be nice to see a role that's meant to inherently scale well into the game to want to go deep into the Ferocity Tree for Bettering Blows (% Armor Pen) and, ya know, want to scale.