To me, there is no such thing as an evil personality trait or spiritual condition. There is only sin, concrete and deliberate action that is simply wrong. It is what happens when one goes against one's nature. It germinates in the shadow of risks untaken. It ripens in power exorcised. Beings like us can take risks no one else can, and exorcise power no one else has. We have the greatest capacity for sin, through action, or inaction.
Meh, not sure whether this is entirely accurate, at least for concept decks. Sometimes an unrefined idea cannot beat the top dogs at first, but with a few suggestions and heavy playtesting, they might get there. Islands' diamond in the rough lists are a good rebuttal to your statement.
Islands' decks are more gazing into the abyss of madness and madness staring back at you. With Manamorphose.