ZW is still PFF's highest graded passer by quite a bit. The difference between him and #2 is the same as the difference
between #2 and #5.
Amongst QBs that have played more than 3 games, he essentially tied with Mac Jones at the top of adjusted completion % (84%) but he has more yards, more TDs, and fewer interceptions. Amongst QBs that have played more than 3 games, he is #1 in NFL passer rating. He also has the most deep TD passes in the country (8) while attempting the 19th most deep passes (161).
Brady Christensen is both the highest graded pass blocker and the highest graded run blocker in the country.
In run blocking the difference between him and #2 is greater than the difference between #2 and #6. He's the only person in the country to be > 90 in both pass and run. In fact, he is the #1 graded offensive player in the entire country anywhere (95.5 - tied with TE Pitts from Florida).
Dax Milne is the #3 graded WR behind only DeVonta Smith and Jaquarii Roberson but he has a higher Reception %, more yards, and as many TDs as both of them combined.