User blog comment:Sentomaru/New kind of powers need to be introduced (not devil fruit)/@comment-2226235-20130306022658

Vergo isn't a devil fruit user, he just uses Haki and most of the people you listed were already introduced. The new devil fruit users were CC, Monet, Momonosuke, Smiley, Buffalo, Kinemon and Baby 5 which isn't more than were introduced in some older arcs like Alabasta.