I can almost 100% guarantee that once you lose confidence under the high ball its almost impossible to get it back. Every bomb is different, you cant coach that fact. Practice at training solves about 20% of high ball issues, it doesn't factor in such things as, game pressure, wind, sun, ground conditions to name a few. You either have the natural approach or you dont, it not something you can coach and once you lose the cobfidence, its gone.
As far as Duf is concerned, to me he's lost the confidence (add into that the other errors which will further erode his confidence), that he once had and will forever have the yipes under the high ball. No amount of coaching will change that unfortunately, because training cannot mimic real game time and the factors I mentioned before.
The question is will he win us more games with his speed than we lose with his yipes?
For mine hw has to be in the 17, the x-factor he brings almost demands that, but in what position?