User blog comment:Emile674/About Crowd Control/@comment-9844148-20130521182602/@comment-6170230-20130521184135

I agree with you that knockups were there before Vi, but they were available for only a minority of the champions (Alistar, Wukong and Malphite, pretty much) because knockups are such powerful tools. Now, there are so many knockup and hard cc, which all round up around clone abilities (gap-hard-CC) that it has became a necessity.

GP and Yi are viable in certain setup, but barely and never at high level of play. As of Fiora, I'll just skip ahead. Hecarim as a very very potent fear (or terrorize) which can be considered an hard CC, so I disagree with you. Although he is one of the most original champion in the game. Yi is a bad jungler and so are several high clear champions because they lack CC. CC will always crush Damage output, which is kind of sad because it doesn't allow high damage clearer to reply with items/skills which nullify a part of that hard-CC.

Lux was never in the equation, as she as very high amount of CC. What I am talking about is pure damage champion (especially in the top lane) being not viable. Champions who's skill provides low or null amount of crowd control.