Wow....that article really did not say much, but it sure did speculate based on a lot of things the author does not seem to know.
For those that are wondering:
The Offensive Pass Coordinator is pretty much a WR coach. They are tasked with knowing the strengths and weaknesses of all of the WRs on the roster. The difference between them and the WR coach is that they are the lead when coordinating with other Offensive position and coaches. They use their knowledge of the WRs to coordinate with the QB and OC to HELP design plays and build a game plan against certain Defensive schemes. What their position does not normally entail is running the Offensive game plan on game day or, in most cases, even having any control of the passing game, the plays called, or the WRs on the field.
So, the idea that Schottenheimer is not in charge of the Seahawk's passing game is a very far stretch of the author's imagination.