Redefine

Argument: Evilly Affable as written is indistinct from Laughably Evil. However, it does suggest another trope which is unique. (For an example of one of those definitions see arks' and Some Sort of Troper's[1] posts on the first page).

Cut

Argument: Article is so poorly-defined as to be effectively useless. 'Villain who is enjoyable to watch' is not a trope. Title causes confusion with Affably Evil. And if we're changing both the name and the definition, we're just making a completely new trope, which can go through YKTTW on its own.