Smart move, he will battle Christian Hackenburg for the 1st overall pick in 2016 assuming they both continue to ascend in their development.
Hackenburg has regressed behind a porous offensive line. He rarely has time to throw and his receivers aren't always getting open. He has been holding onto the ball too long, when he does have time. At times he makes in incredible throws. The talent is there. He looked very good under OBrien. Hack looks jumpy and doesn't seem to feel the pass rush. He has been sacked 25 times and that does not count the times he made throws with guys hanging on him(a la Big Ben).
A very predictable and often head scratching offensive plan doesn't help matters. Franklin is a great recruiter, but having one of his best buddies be his OC is going to bite him in the butt down the road. He has a fantastic DC though and the D alone is responsible for any success they have had other than the UMass game.