J'Mon already has good footwork (though great could be better), he needs to learn and understand the system, QB and catch the ball when it comes his way....
I think he has the other tools. Just struggled with a new system and over thinking and not catching... question is how will he do in another knew system?
As MVS pointed out, they'll have less of a learning curve as the veterans will be learning the new system beside them, instead of the trying to play catch up for 3+ years...