Ekko Adjustments

I've been playing a lot of Ekko, and tried many builds. One build that I tend enjoy more of is one with atk spd increased greatly. It increases more options to his bruiser playstyle build, and not making him as predictable. His kit is definitely is that of an assassin, i'm really trying optimize his bruiser ap build/ sustained dmg. In my opinion an update to his build with his cast time for Q scaling down with atk speed, I believe this will not unbalance him but grant him more flexibility in his build. Another thought that came to mind but may be unbalanced is an on hit dmg while enemies are afflicted with his passive : stabilized.