@Riot - MR itemization counterplay and early game, whoops?!
So what counter-play itemization options are there early game against mages? The only way to start with a magic resist item now is to spec extra gold in utility so you have enough to buy a null magic mantle, but whoops not enough to get a health pot (thus being a non-option for most champions). So the only option left is to buy a ton of health regen items and get bullied out of lane, or invest heavily into your MR runes (which doesn't work in blind pick game mode scenarios) and thus stagnate build options.