Genghis you appear to have read this as 'define experimental test flying', as opposed to an attempt to define the responsibilities of an experimental test pilot, which, as I read it, is what is being done here.
I agree that this first stab misses out the significant amount of work required with respect to documentation, i.e. the development of normal and emergency checklists, aircraft manuals, minimum equipment lists, performance manuals, etc. It certainly took up a hell of a lot of my time! I would also include something along the lines of providing advice to front line operators regarding standard operating procedures (some would say this is OT&E, but it is nonetheless inevitably part of an experimental test pilot's job)