The most important point about Jace in this deck is that is cancels out an active Jace, which considering the game state that usually occurs in, is a great thing. I could see someone going to 3 Cliques too, since that creature is such a house in the right metagame.
Flying is still king in Legacy.
EDIT: In light of the recent trend of the week, Geist of Saint Traft might be an issue for some Maverick lists (read: ALL OF THEM). Any ideas on how to answer this card? A 2/2 blocker is sufficient, provided it doesn't go Farming, but what's our insurance policy when Geist gets equipped with a Sword?

