Disregarding the sheer volume of Ryze reworks, this one is actually really good.

I really, really like how it feels. He has distinct weaknesses and vulnerabilities, you can do some creative combos, he has teamfight potential, and he doesn't seem to be overloaded(heh, pardon my pun) with damage, though he might need a few nerfs. I went in lane with him vs Yasuo, and it just seemed like a fun, fair lane, which never happens with Yasuo.

It's a shame that we'll only be able to play him for a year before he gets reworked again :P