Could you please balance Kha R evolve?

Who doesnt like playing against a Kha´Zix with R evolve and a few kills? You enter your brush and got total paranoia because there are brushes. Brushes between which a permanently invisible bug can run. you facecheck a brush? loose all your hp. even sweepers dont help because when you are in range to see him on it you can think about entering your jungle again with a grey screen.