If Dunn swings more his avg might go up. His OBP would likely go down though. His other stats may go either up or down depending on how well he adjusts. Pretty much a wash no matter what happens. I'm not too concerned.
"And so he spoke, and so he spoke, that lord of Castamere. But now the rains weep o'er his hall, with no one there to hear." - The Rains of Castamere