He's another Petiffer. Teased us for a couple of years, doesn't do the hard things and looks disinterested now he's been dropped.
Mid sized fowards have got to be exceptional (ala StevieJ) to be specialists.
Otherwise they need to transform to be able to play on the ball or up the ground as required.
Think of a sprinkling of good examples who've made that transition. Didak, Akermanis, Johnson, Hird, Rioli, etc.
Hardwick is rightly not happy that Mitch has shown himself to be pretty one dimensional and unable to show a rounded game.
He's talented but he's not elite & he'll go by the wayside if he can't round out his game pretty quickly.