The future of LoL

So I was watching this video http://www.youtube.com/watch?v=pIVRTR6Gwyc&feature=feedu. It is the Fizz patch preview. So what I found out was that they are changing the mastery trees. Watch the video and go to the around the end of it. They show three new mastery trees. This is a big game changer. We are going to have to change all of our builds around this. I do now know how bad it will affect the game but all we can do is sit and find out.