A few comments:
1. Last years team was rolling with 400+ yards in every game but 1. They had ~500+ in 2. This year they only have 400 yds in 2 of the six and never snifffed 500.
2. These stats ignore that Knox, McK, and Davis all missed a game. So your comparing guys with 6 games with guys with 5 games.
3. Yards - Despite all the targets/receptions yards matter. All had a lot more yards last year - 300+ more yards. You can throw know 100 1 yd passes and say how he is having an amazing year with 100 receptions, but if its for 125 yards who cares.