There are some champions in TFT that I don't want them to use their ability, because they are just that bad. An example of this is Zed. The ability feels extremely clunky and slow for an assassin (unlike in summoners rift). It often feels like it does less damage than a crit auto (minus the fact that it does pass through units) in the later ranks. When targetting few units with his ability, it doesn't feel good. My biggest problem is that he now loses out on some vital lifesteal that he would get from BT and can be pivotal in fights.