Have Ahri build up her MS by each rank instead of letting her have 215 movement speed at level 1
Rank 1, she has straight 215 movement speed bonus all the way to rank 5 of her Q, she is always very safe in the laning phase and its hard to catch up to her, there is no reason for her to have straight up 215 ms without needing to max your Q first up to get it,when her pre 6 weakness is gone ever since they given her a movement speed buff on her Q for no reason other than (DFG removal, which she is still very good without it). Which makes laning with her a pain, she has low risk and high reward. The other downside about her is that she can have lil troubles with late game
An example of how I would change this is
Ranks: 55/90/105/145/185 Bonus moment speed for her Q
This can also effect her roam as well. Since she is the queen of mobility, she also has zero troubles roaming into other lanes even if her ult is down. She really needs risks