This really isn't all that complicated.
Charlie Jones performed well on special teams for Iowa. Was that a function of him being that talented. Or, Iowa special teams executing and him benefiting from that. I'd say a bit of both.
He was a solid WR, made some plays at Iowa and was not the main option in an anemic passing offense. He left so he could be a bigger part of an offense, catch some balls from his buddy and do what is best for Charlie. His right to do so. I say good riddance.
If someone said one receiver, from Iowa, was transferring and it was between A. Bruce, C. Jones and K. Johnson...... I say we made out in that deal. CM is right. If Charlie Jones, all 190 lbs. of him, is your number 1 option? Good luck Purdue.