Please diable Ryze until you hotfix him
Having a 1.75 second Root constantly up, that is targetted, instant, and deals good damage is one of the most cancer things league has seen in a LONG time. He needs to be disabled until you finally get around to hotfixing him.
My personal suggestion is not being able to root the same target for at least 6 seconds. Sure, he can have it up a ton, but the root won't apply, making it so that people can actually fight him...