Kha's evolved ult

I really love to play as Kha, he's a super fun champion to play. And i do understand the balance changes but i think it was unnecessary to change his evolved ult. It takes away the creativity of how to use it and makes him a lot more boring, if you really had to do something like this just make the resets on the bushes to make him invis take longer. I think we need to change around how this works. I had a gank mid that i loved to do when they had the bush warded. I would use bush invis then ult then use next bush invis then ult again and stand right on top of him without him even knowing because he thought it was safe because he left a ward. Thats the fun creative stuff that makes him really fun, but now he's kinda boring. Do you not want us to evolve his R?