Mine is that it appears to offset the games main win condition (Ill never get to 0 if I keep gaining life.) and thus seems more powerful than it really is
Its commander, Teval, the Balanced ScaleTeval, the Balanced Scale, manages to enable a graveyard strategy with a small ramp subtheme to help power out the Dragons that it and every other Tarkir: Dragonstorm precon wanted to include a least a few of
Jamie McCrimmon also curves beautifully into an old favorite of mine in Surrak, the Hunt Caller
Lefou Bumbler costs one less to play should you have either Gaston Intellectual Powerhouse or Gaston Baritone Bully in play
Would I rather top deck it than a land while I'm empty-handed
Plus going all-in on a 5-Drop commander that has no built-in protection and requires you to spend additional mana to do anything seems very sus at least in my meta where interaction is so prevelant, as the deck would just fall apart if Gravemother died like 2 times