The new masteries will never have diversity

You know why? Cause every single one of the keystones does basically one thing, add or reduce damage in completely unimaginative ways. I'm sure there's a ton of ghostcrawler doing the only thing he knows in these new masteries but I'm also pretty sure they got a little inspiration from the path of exile keystones as well, I mean they even took the name. Problem is path of exile keystones offer fundamental changes to the way you play your character by forcing you to make sacrifices in one area in exchange for a buff in another.

Tacking on 200 extra magic damage on a Zed rotation or giving the 100% crit Yasuo free steroids for criting doesn't change shit and there will never be diversity, they'll simply pick the one offering the most stats. I think if the aim is to really make the keystones impactful the first thing that should be introduced is some yang to all the yin.