This is worth a read. It's a lengthy in-depth Pro Football Weekly article with videos, and I can only post a snippet here.
LINK Schofield: If Nagy wants to make it work with Mitch, it's time to turn him into an athlete If Nagy wants to stick with Trubisky and make him be an effective quarterback, he needs to stop putting him into situations that require effective quarterbacking.
The more and more I study quarterbacks, the more I have come to realize that quarterbacks simply are who they are coming out of college and while you can smooth over the rough edges, they are in large part the passers we see on their collegiate film. Yes, there are exceptions to the rules, and yes scheme fit and coaching matters, but there are more instances of quarterbacks living up to the standards they set in college, than there are of them becoming something vastly different.
If Nagy is going to go down with the ship - you’ll excuse a nautical reference there - then play to what Trubisky is right now, and perhaps always was. Move him around, use him as a runner, and give him simplified reads with the ability to tuck and go. Perhaps his processing speed is not where it needs to be. Perhaps his mechanics from the pocket will never be fixed. But get him on the move and suddenly flaws are minimized
LOL, most of here have been calling for that since week 1!
I do think its telling though that Trubisky has steadily declined and fell off a cliff starting approx. a year ago when he got hurt vs Minnesota and his scrambling/rushing yardage declined dramatically.