Nathaniel Hackett is on the record saying that he wants a smart, accurate and tough QB. Kenny Pickett would fit that bill. The worry with him is that he has some of the smallest hands on record for an drafted QB. His hands were measured at 8.25 inches at the combine. The ball in the NFL is actually bigger than the ball used by the NCAA. This may seem trivial, but for QBs with smaller hands it can (and has) led to problems adjusting to the NFL.
In general QBs with small hands don’t last long in the NFL as starters, but there are exceptions.