FFS. You don't even realize how you're disproving your own original point do you? If the rushing numbers went up, and the passing numbers went up, while his main options went down, that must mean that not only was he taking it into his own hands with the rushing, he was also getting more of his teammates involved.
Never mind the fact that Mooney was now facing team's #1 DBs and coverages to take him away, Claypool changed teams midseason, and Monty was splitting time with Herbert. Not to mention that, aside from Mooney, the numbers are statistically insignificant, or "about the same" as you originally stated when trying to knock Fields. All while his total passing volume decreased from the year prior. Congrats, you've now completely proven that Fields is improving. Glad that's settled.