New Masteries Create the Illusion of Choice but don't actually provide meaningful choice.
The Keystone masteries are interesting, but you can only have one of them. Also sinking 5 points for a single mastery is actually retarded. If you're going to get CDR you basically have to put all 5 points into that CDR mastery. No one is actually going to be like "hmm I think I'll put 2 points into this and 3 points into that" at the same tier. You're REQUIRED to put 5 points into that tier to move onto the next tier. In any tier, one stat is strictly better than the other FOR A GIVEN CHAMPION. So Rito is essentially creating the illusion of choice saying "oh you actually have 10 points to spend in this tier," when it's a fucking lie, since the only choice you have is "I'd rather have this thing over this other thing". Makes me wonder why bother having 5 points?? Also, the numbers on a lot of these masteries are definitely worse than some current masteries.
This new mastery tree also encourages following a strict 18-points in one, 12-points in another scheme and DISCOURAGES more intelligent choices like "actually I'd rather sink all my points into this tree" or "I want most in this tree and a little in the other two trees." No thank you, Rito. The keystone masteries are interesting, but not at the cost of EVERYTHING ELSE.