I think the idea of the camera following Dwight is because he was a part of the "documentary" for so long, they watned to give the audience an idea of where Dwight ends up, for closure, if anything else. I'm guessing the three Stemford employees who left weren't there long enough to warrant the "Where Are They Now" treatment.
That's just a calculated guess.
I've seen ONE movie so far this year: Borat - (5*)
A. No, he WAS an integral part of the story. Once he is fired he is no long part of the story.
No, their story started with Dunder-Mifflin and then evolved to largely be about four central people there. Why can't the "editors" can make whatever choices they want as to what their documentary is about?
B. Staples would not let someone doing a documentary about another company film at their store.
Interesting. Do you work for Fictional Staples' hypothetical scenarios department?