Probably overdue, but what this really means is that Alex Smith gets his 6th offensive coordinator to work with since 2005. Hard to get much consistency going when you replace your OC every season.
If you go through 6 divorces, eventually, you have to stop blaming your ex-wives and point the finger inward.
Offensive coordinators don't get fired when their offenses are performing well. Alex Smith runs the offense. At this point, it's fair to say that Smith's poor play is the cause (not the result) of the lack of consistency at the OC position.