Most exaggerated expectations were from fans who didn't understand anything about CJF except that he was highly rated and highly recruited. Most thought he would come in and dominate because of his size. Which was what alot of recruiting analysts were pinning his ratings/rankings on. But he was used as a WR in HS and he never had to put any effort in at all, mainly because of his size and strength.
CJF said that his first year he was learning how to play TE and actually blocking, not just catching the ball. Coaches were even talking about how he didn't know how to get down into a 3 point stance on the line. Iowa primarly lines up TEs down on the line unlike standing up as a WR like CJF did most of his young career. He also admitted that before last season he didn't put in the time he should have. Last season he dropped way too many catchable balls, however it was a horrible season all around.
I hope he can have a year where everything comes together and plays to his potential, not the potential others felt he SHOULD have played up too. I do understand how learning the position would have slowed his development to the college level but clearly his "lack of effort" in his first two years were what hurt him the most.