I'm not sure about anything being wrong.
There's a booth at the entrance infront of Wing #6, which is not the same as the one marked on the Pickering's (actually Google Earth's) photo and most probably not the same Mr. Morin was talking about.
There's a weird vertical bluish-grey line/pole just to the left of the booth, but it probably is a real object, even though it looks, say, ethereal (or like a digital editing line). The pole to the right of the booth looks pretty much the same, except it's a bit darker in color.
The 8th wing of NAnnex looks different than the rest of the building, but it was built decades later, so there's nothing wrong with it looking differently.
The top of the VDOT camera pole is visible through the wire fence at the end. Just saying, not that there's something wrong with that.
There are no real trees or other obstacles in the way of the Pentagon's roof. Just saying, not that there's something wrong with that. But it does appear that Mr. Morin would not be capable of seeing the impact site or the fantasy flyover, even if it were real.
Other than that, I don't know.