Seven. I'll stick with seven.
1.) The big one is the idea that the Shanahans are not West Coast coordinators. Mike Shanahan found a lot of success with the 49ers and has always run what's usually referred to as a modified or run-heavy west coast offense.
2.) The idea that Shanahan would necessarily switch terminology because last year's offense was bad (and would do so because of his ego). Shanahan is going to use the terminology he always uses irrespective of what his predecessor did. If Shanahan and Smith were close enough on the same coaching tree they might use the exact same terminology and scheme even if they applied it differently-that's actually a reason teams sometimes intentionally bring in a guy who used similar terminology (e.g. Mangini replacing Romeo).
3.) Related to point two, the idea that the Shanahans would definitely use different terminology than Sherm Smith. Different coordinators use the same or virtually identical terminology all the time. I personally didn't know if the Zorn/Smith west coast offense uses much of the same terminology as the Shanahan system, so I looked it up and found an article where Kyle Shanahan says his offense uses some of the same terminology and concepts as the Zorn offense. http://www.redskins.com/gen/articles/Kyle_Shanahan__New_Offense_To_Have_Similar_Foundation_105982.jsp
4.) That Grossman was on the Redskins last year.
5.) That Grossman didn't throw a pass last year. Yeah he only threw 9 (and in Decemember so within the year) but still.
6.) That Grossman wouldn't know the Shanahan terminology better. Since Grossman was on the Texans with Kyle Shanahan as offensive coordinator he actually probably did know the terminology fairly well.
7.) It's not wrong but it's misleading to describe Sherm Smith as OC. It was Zorn's offense, Zorn called the plays, and then Sherm Lewis took over. This was highly publicized.
That's all I can think of but it's a huge number of mistakes for one paragraph.