Where were they at Marineford?
If Zoro is going to be pushed to a solid medium difficulty (or even higher), by his Egghead opponent, then his opponent should be stronger than King (who was himself a level above Marco).
If such strong VAs existed (excluding the anomalous Garp who turned down an Admiral promotion), where were they at Marineford?
Why didn't these > King VAs take on the likes of Marco, Jozu, Crocodile, Ivankov and Jimbe? Why was this task mostly left to the Admirals?
Also, why introduce the seraphim? These kids are (currently) weaker than King, but hyped to be the ultimate weapons. Why introduce them and make such a big deal about them (even going as far as to abolish the Shichibukai), if such strong Vice Admirals existed?