But because he excels at fighting the ONE individual, he suffers when fighting more. This hurts both Ryze as well as his own team because it makes it so difficult for him to actually do his job. He is BARELY considered mobile, with his ult (counting mobile in the game sense, meaning dashes, blinks, jumps, etc), and when push comes to shove he is somewhat lacking in the contribution for the team.
This is the problem. When it comes to fighting in 1v1, he has an upperhand that will make or break the lane.
Once he's needed for the team, he becomes unable to function nearly as well unless some ADC is stupid and gets caught out.
How would you consider changing him into something that offers more counterplay in lane without just straight up making him a punishment to both you and your team to play as?