How To Properly Nerf Fiora

So it occurred to me that RIOT doesn't know how to properly nerf Fiora as seen in 6.4. So here is my suggestion. After numerous games against her, I've been trying to figure out some way to nerf her without making her nonviable. At first thought the reduction of time on her riposte window seems like a good idea but i figured that would hurt a lot of people who have high ping issues so i swayed away from that. The problem I have found is her passive. Though percent true damage is a little harsh and the health and movement speed are also rather annoying, the problem lies in how often it comes up. Fiora should be a late game monster like Vayne, yet she does surprisingly well in the early against nearly all match ups. The reason being that she can just poke with her lunge and back off, which is OKAY. The problem is that as soon as a Vital is hit, a new one is instantly ready for her to hit shortly after allowing her to dominate trades early. Fiora already contains great mobility which is acceptable with how squishy she is. The reason she is so dominate, however, is because she can quickly trade every few seconds with the range on her Q and the time Vitals refresh. So my proposal consists of two parts, either which if implemented, may slow down her early game because Fiora should suffer heavily in the early game and scale well into late like Vayne. Part one consists of a simple range reduction of her Q hitting something. So don't reduce the dash range but make so she has to get in a little bit closer to hit her target. This would cause her to take a bit more care when going in for that harass even with the movement speed because she has to get closer to her target who has a better chance at retaliating. Though this is a general nerf overall, I feel it wouldn't hurt her to bad come mid to late game when she gets some life steal. Second Option, which i feel is a must, is have her Vitals on a Scaling level cool-down. What this means is early on, she can't just go in and out and dominate trades early as the Vitals won't always be up, but come late game they should be about as often as they are now. I feel like a 5 sec cool-down before a Vital is up again would be a good start and as she levels up it returns to how it is in live. Anyway that is my two cents feel free to comment etc. and insult me for losing against a Fiora. I just hope a RIOTer will see this.