|Player||Minutes||Possessions Used||Usage Rate||Positive Outcomes||Negative Outcomes||Ratio|
One thing that jumped out to me is how far Aguero's usage rate has fallen from 2013-14. As a commenter mentioned on Twitter, his key passes per 90 minutes have fallen dramatically this season, and that appears to be a big reason for the dropoff. That may be because his strike partner of sorts is Silva, who is definitely a pass-first player. Since this only gives credit for the final ball, it may be that Aguero isn't really less involved in the play, it's just that Silva isn't taking the shots Dzeko or Negredo took. Also for those who think injuries have been the primary factor this season, it's worth pointing out that Aguero has played 200 more minutes this season than he did in the entire 2013-14 campaign.
Going along with the general theme that the offense is less potent this season, it's worth noting that the positive relationship between usage rate and having a higher percentage of positive outcomes (see the "Ratio" column) has decreased. In 2013-14, the r-squared was .78 and it has dropped to .41 this season. That means that we're doing a worse job this year of getting the ball to players who can do the most with it. Aguero and Sterling stand out as two players with low usage rates but very good percentage of positive outcomes on the possessions they use. For Bony defenders (are there any besides me and Mike Goodman?), he has a high ratio of positive outcomes and has been more involved with play than Aguero. However, this (simple) model doesn't distinguish between shots, so the one he almost hit the corner flag counts just as much as his goals. Still, I don't think you can really say he's the problem offensively.