1) Did nothing to make the game more diverse, same cookie cutter choices as always
2) Nerfs of champions benefiting from keystone runes, despite the later nerfs to the keystone
3) None of it feels like it has any effect on the game, "hidden power", bland choices
Honestly besides Thunderlord's Decree being the best choice right now, it also has the most satisfying animation.
This is, what, the third or fourth time i've seen Riot re-do the mastery system....and each time ends the same.