Well, that's not a good solution because it prevents it being an escape, making it more favored in gap-close assassins and fighters.
Flash will still be used, I can't imagine it not.
If your team only keep releasing champion with a gap closer, blink, dash, etc and you keep nerfing flash, i dont feel like this help to keep low the mobility creep. Right?
is there any change in the map? like lanes more big or just the same map?