Funny you say that , few weeks ago I had a zed on my team who was 11-5 won his lane pretty well with some decent roams. Then in teamfights around 35 mins everytime he ulted the twitch , the enemy soraka would just drop the silence field under the twitch and the twitch would just stand there and right click.
At first i was gonna type to the zed and tell him to stop throwing. But then i stopped in my tracks and just thought, wow what would I even do in his shoes? You shouldnt have to be LL stylish or Faker just to play that shit when the opposition is some mediocre twitch / soraka gameplay and feel free to substitute soraka for janna/lulu or X windspeaker support. Substitute twitch for tristana or X hypercarry right clicker.
TLDR the zed buffs dont accomplish much IMO and just push more power into a champ that might for once be in an ok spot.