The Keystones will always be a cause of grief.
Yes its nice that they have more impact on the game than the old masteries but we're on the scale of too much here.
I'm sure a quick comparison will show you all that some of the keystones are more powerful than champion passive abilities.
This is wrong. I play league for the diverse champions. Not some arbitrary broken mastery of the week mind game.
There will always be the strongest mastery which will be abused and Thunderlords will likely remain it because its easy to proc and gives burst damage. That alone makes if favourable for landing phase which is what League is apparently all about nowadays.
Not to mention these keystones benefit certain champions too much while leaving others abandoned in the dust. Not to mention the keystone implementation only managed to get Swain, Karhtus and Anivia nerfed. Cause that was so badly needed.....not!
Way to go Riot you've introduced another broken impossible to balance system into the game. Have fun focusing on masteries more than champions for Season 6.
Seriously Someone name me one good thing that came from these Keystones. All they've done is giving us broken champions, nerfs to mages which didn't deserve them, and imbalance issues forever.