I have seen a new OC/QB light it up in year 1, in college and NFL. More than once.
I have seen QB’s have a different OC 2-3 years in a row and struggled every year.
It could very well effect the performance.
It might also be the common denominator is the reason for continued struggle, common denominator being an average QB.
So I don’t discount or assume anything.
I think the common denominator here is JG is very average and another year won’t make him much better.
I think we will have a couple of better QB’s with a much higher ceiling and I hope they get the chance to prove it