Can we do something about Twitch?

Twitch has been too op since assassin's update, and haven't received a nerf yet. The reason why most find him annoying is the fact that you can't see him comming since he just camouflage himself and then position himself around the opposing team and then proccede to kill everyone, also Pink wards aren't working anymore on him since he uses camouflage instead of invisibility, also just the fact that he can't be seen makes a great pressure to the whole opposing team and makes them uneasy to do teamfights or objectives. In my opinion his camouflage duration should be lowered, it gives way too much time to observe the situation and time up his entrance.