he played 89% of Offensive snaps. Before the final game, Trubisky attempted 4 passes in 5 blowouts (only in 1 of them did he take more than 15% of snaps).
Had they left Josh in those games, there's no reason to believe they would be asking him to pass any more than Trubisky did---just run out the clock.
So Josh would had had little, if anything, to add to his stats in any of those games if he played them out.
That leaves only the final game, in which case he might have had another couple of TDs before they switched to runs to end the game..
All in all, not much different.