In my quest to understand the meta-game and try to make it better, I want to discuss the graveyard. Of all of the formats in Magic, Vintage makes the most efficient use of the graveyard.
Dredge is obvious because it is a crazy deck due to the graveyard. Xerox makes very heavy use of the graveyard but in a much more subtitle way. Dark Ritual style decks and any deck with Yawgoth's Will can make the graveyard explode into a win condition.
Should playing graveyard hate be a main deck consideration? It does not do much against Shops and other aggro decks but it does hurt at least 30% or more of the meta-game.
I have been thinking more and more that considering the hate as a sideboard only option is not smart. The rise of the Survival deck makes my point.
This is like asking do you run Hurkly's Recall main deck because it is only good against certain decks in certain situations.
I think if we want to balance the format beyond where it is now the consideration of dealing with graveyards main deck must be a consideration.