Riot, is your goal to make AP Ezreal a Trash Can?

Cause if so, you are doing gods work.

Let me tell you why your way of changing him is terrible.

Let's look all the way back when Lich Bane got that nerf. You took a lot of AP damage from him when nerfing Lich Bane. To compensate? Double his ap ratio on his Q. Which to note: Adds Physical Damage instead of Magic. So you hit him pretty hard there.

Now we look at what you're doing now to screw him over 100%.

Making Runeglaive work like Lich Bane, no more 100% Qs that AP Ezreal needs. This is a pretty good nerf if you don't want him around. But, now you take an extra step. Nerfing his ult by making it 60% AP instead of 90%. So take more Magic Damage from him, which he needs badly. Then you put MORE PHYSICAL DAMAGE ON HIS Q. Like come on. Why take off Magic Damage and put on Physical Damage on a mage? That is like making Xerath's Q do Physical Damage instead of Magic Damage. It ends up being shitty and doing no damage to tanks who build armor.

My suggestion is: Make his Q do magic damage after getting 100AP and keep the ult ratio to prob 75%.