Compromise for the Kass nerf
Nerf the range like you are but let him have the old range when going through walls.
It'd be weird as fuck to code so idk if they could but I really don't care about the real range as long as you can go through all of the normal walls since you should have to think about where you Riftwalk instead of just mindlessly outspeeding everything by spamming it.
If it's confusing, think of it like this:
Ezreal can go through pretty much every single wall except for that incredibly thick one near tribush and bottom lane. Kassadin can currently go through it at just about any angle. Let him continue to go through that wall but nerf the actual range.
I don't want to relearn all of the walls I can and can't go through.
Also I think the range is still a bit much since Kassadin's the only one that uses his blink offensively.