I would not use the number 14 pick on a player as Raw as patterson. It will be 2 years before you see any returns on the pick.
Where are you getting that idea from?
Patterson is an automatic upgrade at receiver over,
Murphy, Gettis, Adams, Pilares, and possibly even LaFell if Brandon has hit his full potential.
He would be an automatic upgrade at PR/KR also, no doubt.
Don't let the sloppy route running scare you. What rookie DOESN'T have to work on their route running at the next level?
Even with sloppy route running, patterson's speed and play making ability makes him more valuable than everyone but Smitty.