This is the worst patch/season
This entire patch is just god awful. Experience earned is grossly unfair, minor mistakes ruin entire games, outcomes are decided by the 10-15 minute mark in 75% of games, you must rely on your team not to feed, and its extremely hard not to once your opponent gets 1 kill. 1 kill on an opponent creates a ridiculous snowball effect, especially with experience. Season 5 was all about providing teams different routes to victory, while season 6 is chalking up to "win lane and hope your teammates didn't lose too hard."
I didn't mind that games were 45 minutes long on average, but I understand the desire to make them shorter. I definitely don't think they did it the right way though. The whole game is unbalanced and to be honest, I don't think a few champion/mastery fixes is going to change that. They pretty much reworked the entire game to where it has an entirely different feel to it, and is creating a frustration that I have never experienced before.