Here is a clip of every impactful completion that Mitchell Trubisky had last week against the Vikings. There are some nice throws in there (he consistently used to airmail those deep crossers off PA), but most of the damage was done via boots and play action ...
My view is that Trubisky's production in a boot-heavy, QB-friendly offense recently shows how little the Bears were helping their QB over the past couple years, and that Trubisky probably falls somewhere in the middle class of NFL QBs who rise and fall with their circumstances.
He looks functional in a system that makes most QBs look functional, against a collection of very bad/declining pass defenses. I don't know what this does or should mean for the future. Trubisky probably isn't as bad as he looked at times, but he's not this "good* either.
Trubisky has looked better, but the more important improvements have likely come in how the Bears' coaching staff is helping their QB. If they're running this back (which now seems likely), I'm not sure how many QB options are definitely better for them than Trubisky in 2021.
The most likely outcomes for this team always hovered around 8-8 with not much money to spend in 2021, and we knew that would leave them without a real future path at QB. And that's where thing are.