I'm a Cutler fan and I disagree with your reasons/excuses. Other than the coaching, I don't think the rest is right. I believe he is getting better because he is maturing, realizing he doesn't have to do it himself now, and good coaching. He played fine with no names out there at receiver this year.
I always liked Cutler, but even I can't make a hundred excuses for the guy. he's a team player and he wants to win, but I think the pattern that's been evident with all the shit OCs he's had is that he won't give them the time of day if they're shitheads. that .gif of him sitting down and getting up when Tice came up to him is still hilarious to me. that guy was a total joke and had no business being an OC. for the 612th time, that's why Lovie Smith had to go. I don't care if they beat 10 losing teams or had some top 5 ranked defense, he kept outfitting the offense with shit coaches. Martz was the only one that came close to being legit, and I would even argue he was; Cutler previously played his best with him.
the offensive lines when like Omiyale and Webb were with the team were total ass. not until Trestman and Kyle Long surfaced did they really anchor things down there. last year when most of them were hurt you saw an immediate difference. they had strong receiver play since Marshall came, the smurf era was finished then. really I think it just came down to Cutler buying into the scheme, and when he didn't wanna deal with the shitheads he just went vigilante and did things his way... not necessarily for the better.