Actually can argue with this as the numbers appear wrong. Howard had 646 snaps. 231 pass plays where he didn't block, 96 pass plays where he blocked, 269 running plays where he didn't bock and 50 run plays where he blocked. So you forgot to account for the fact that he may be in on a run play but not get the carry and or be responsible for blocking.
So all told that is 327 pass plays and 319 run plays or pretty much 50/50. That is fairly balanced and contradicts the idea the offense is predictable with him in. It was not. The offense was balanced with him in and since run plays yield less yards than pass plays, that balance meant the yards per play would be less.
By contrast, Cohen had 541 snaps. 364 of them were pass plays were he didn't block, 11 pass plays where he blocked and 103 run plays where he didn't block and 63 run plays where he blocked.
So all told that is 375 passing plays and 166 run plays or a 70/30 split. So the irony is it is Cohen that makes the offense predictable because they pass overwhelming when he is in the game. That also means though the yards per pass play when he is in is likely to be higher since passes yield more yards than runs.
FYI, the above numbers are from PFF.
