We've seen "fear of impact" as it was on display with Chris Leak. We've seen Franks bash his way to a first down, pile drive his way into the end zone. Fear of impact isn't there.
What Franks is derailed by has got to be something intrinsic and buried. Possibly, it's that he lacks the instinctive biofeedback of muscle memory. With Jefferson 40 yards downfield FF throws it 46 yards. Lacking that instinctive muscle memory feedback, he has no ability at "honing" in. Thus, similar play with Swain gliding open 40 yards downfield FF overthrows Swain by 8 yards. His brain-muscle link ain't there. Lacking that "muscle-feeling" that informs & tunes the arm throwing, every pass is an unlearned surprise. This disorder would make even practice an unlearning regimen. Not to mention that the first to be frustrated would be Franks and, to me, this shreds smooth confidence and inserts anger-doubts into his delivery.
Just by Wuerffel's uncanny accuracy at throwing the "fade" multiple distances, you know, he learned varying muscle control. Wonder if Mullen has repeatedly had FF practice the fade? Maybe that could develop his overall accuracy, his touch? But is that fantasy island: "the fade, boss, the fade.