Ryze is still pretty stupid
Ryze has an obnoxious strategy to clear the wave easily with E E Q, back when oom, return to lane, and repeat. It's pretty frustrating taking advantage of a supposedly weak early game, when Ryze can just push the wave whenever it comes to his tower. By upping his Q's mana cost (it currently only costs 40 at all levels), Ryze has to manage his mana more carefully instead of just throwing Q out at any chance.
On the plus side, Ryze gets more health back from RoA.
Edit: So you down vote because you think Ryze is completely fine where he is?