Before we bash Bevell, we have to remember that he has one of the most difficult OC jobs in the NFL. Though Wilson is very talented, the combination of his height disadvantage, a bottom ten pass protecting line, his tendency to hold the ball, the inability of our receivers to get open on scrambles, and Wilson's hesitancy to throw to open receivers if they are not open enough makes passing the football very difficult, especially when you play in the NFL's best defensive division with a bunch of brilliant DC's who know how to attack your passing game.
To counter these issues, Bevell has implemented a new offense designed to work around these problems. And when he's remembered to hand the ball to Lynch 20+ times and take 3-4 shots deep a game , the offense has looked amazing.
Unfortunately, Bevell has at times been guilty of trying too hard. Too many trick plays. Too much manufacturing of yards. His offense this year is almost Chip Kelly-like, and Chip Kelly offenses tend to run hot and cold. And when they fail to hit on all cylinders, it's impossible to control a game.
It feels like this season, a premium has been put on scoring at the expense of control. Seattle is doing a pretty good job scoring, but they've conceded too much control in the process. They need to get some of that control back, and that starts by getting Lynch his 20+ carries every game.
It may be an unpopular opinion but I think Bevell has done a pretty good job this season with the exception of the most recent game. He needs to get our offense back to being a controlling unit, and he also needs to start tailoring his game plan more to what opposing defenses give him. But I think if he makes those adjustments, offense will be the least of our worries this season.