A point that might be unpopular is if we have more AP itemization for the different AP users then we can make the items generally more weaker. Because a complaint that people have is that AP items are strong but that's because they have a general strength to them since they have to go on so many different people. But if we had more varied items we could tune them to each class like how AD does it.
On the other hand, you can hold the same argument for Magic Resistance items and the removal of Zhonyas. If you think about it, there aren't many items out there and Magic resistance scaling is relatively low for everyone. I think that MR should scale just as high as armor and or even higher just and only because they are the only ones who can still build over 1k damage and have their abilities relatively scale decently or as much as 120%. (I'm looking at you Neeko R.)
there are almost exactly as many AP items as there are AD items.
