They won't get to even see him get better because they'll be gone by then. If he does get better (he won't), it'll be several years & several WR's careers over by then. Lets ask Marquis how he feels, I'd be willing to bet if unleashed the answer would be quite harsh.
I'm sure the TV's on, so I guess that's good enough.
I just looked it up, QB #31 has about a 40% higher rating. That's not a gap, that's an ocean away. Worst starting QB in the league by far using this metric.