I said in my first sentence that Kelly is the bigger problem.
It probably doesn't matter who plays QB with Kelly as HC--but I was just stating that I don't think Book has skill set needed to lead ND to a playoff win or more.
If you look at the 4 teams in the playoffs last year--the other 3 had superior QB's(and Coaches). I don't think Saban,Swiney or Riley would recruit or even play a QB like Book who could not threaten the back end of a defense.
It is a shame that ND will waste some fine Sophomore speed at WR because the QB can't get the ball downfield. Last year, I think ND had only 1 pass play of over 50 yards. No matter how much Book practices the deep ball--he will never be a real threat with it.
Book is a better version of Rees but really quite similar..