Can we just get rid of Keystones instead? The only thing they bring is problems.

You can't go anything except at least 18 in one tree because of how powerful they are.

A lot of the Keystones used to be near useless and some still are or are extremely uncommon.

As usual, Thunderlord's dominates for massive burst.

Fervor and Bloodlust had brought their own share of problems as had Grasp and Colossus in the past.

At most, the only diversity you can get is going 6/6 on 2 trees rather than 12, but that cuts out so many crucial mastery abilities it's not worth it.

They also give unnecessary or additional power that just leads to being stupidly strong in early.