If you really want to judge Kiffen based upon how well his scheme is working you have to judge him based upon the entire season and not just on the last game. I've taken the time to compile some stats for you guys. First, a game by game breakdown of the passing defense with totals and averages at the end:
Eli Manning: 27/42, 450 Yards, 4 TD, 3 INT, 102.3 Rating
Alex Smith: 21/36, 223 Yards, 2 TD, 0 INT, 95.0 Rating
Sam Bradford: 29/49, 240 Yards, 1 TD, 0 INT, 80.2 Rating
Phillip Rivers: 35/42 401 Yards, 3 TD, 1 INT, 120.3 Rating
Peyton Manning: 33/42, 414 Yards, 4 TD, 1 INT, 129.6 Rating
Robert Griffen III: 19/39, 246 Yards, 0 TD, 1 INT, 58.3 Rating
Nick Foles and Matt Barkley: 22/49, 209 Yards, 0 TD, 3 INT, 31.7 Combined Rating
Matt Stafford: 33/48, 488 Yards, 1 TD, 2 INT, 91.3 Rating
Christian Ponder: 25/37 237 Yards, 1 TD, 1 INT, 82.7 Rating
Drew Brees: 34/41, 392 Yards, 4 TD, 0 INT, 139.2 Rating
Total: 278/425 65.4 %, 3300 Yards, 20 TD, 9 INT, 95.8 Passer Rating
Average: 27.8/42.5 65.4%, 330 Yards, 2 TD, .9 INT, 93.06 Average Passer Rating
Now we will move on to the rushing game:
Giants: 14 carries, 50 yards, 3.6 ypc
Chiefs: 25 carries, 114 yards, 4.6 ypc
Rams: 12 carries, 35 yards, 2.9 ypc
Chargers: 27 carries, 112 yards, 4.1 ypc
Broncos: 31 carries, 103 yards, 3.3 ypc
Commanders: 33 carries, 216 yards, 6.5 ypc
Eagles: 23 carries, 84 yards, 3.7 ypc
Lions: 29 carries, 143 Yards, 4.9 ypc
Vikings: 29 carries, 169 Yards, 5.8 ypc
Saints: 38 carries, 242 yards, 6.4 ypc
Total: 261 carries, 1268 yards, 4.8 ypc
Average: 26.1 carries, 126.8 Yards, 4.8 ypc
And finally points allowed:
Giants: 31
Chiefs: 17
Rams: 7
Chargers: 30
Broncos: 51
Commanders: 16
Eagles: 3
Lions: 31
Vikings: 23
Saints: 49
Total: 258
Average: 25.8
Some of these stats are subjective. Teams that are behind throw a lot and get garbage yards. Teams that are ahead run a lot and point allowed doesn't take into account if the offense turns it over deep in our own territory. It seems obvious to me however, that if you look at the stats we have only had two or three solid defensive games all year. Most of the games have been defensive debacles, especially in the yards allowed area.