You're tweaking Ryze?
Although I main Ryze, I admit I'm only Gold. I know it would make him more op in his current state, but you could shift power from his Q to his E. Then you could play around with nerfing his Q a bit. I'd love to see his Q be more of a, "This is my final setup" rather than a, "This ability unleashes my damage" type of ability. Almost like utility ability but not literally utility. And I'm talking about how his Q is the ability that either #1 Gives him a shield and a speed boost, or #2 unleashes a wave of damage onto his E stacks. I think it's really fun how the same abilities have a different effect in a different order. That's something really fun and unique and that's why I like him the most/ main him. Try not to change him too much if you can. As much as I absolutely L O V E his ultimate, I understand you could adjust or change it.. but then I'd be sad. Even something like a speed boost after you and your teammates leave the portal zone (get teleported) could help raise his winrate.
EDIT: A big problem for new players is getting his E to work properly and they don't understand how to use it in team fights effectively. Maybe not increasing the range on it, but maybe a small and short speed boost after using it? You could shift the boost from his combo onto his base ability, but then make it smaller.