A good response A Comfy Chair, I agree with all that you say, but the "quick" availability of the requisite data (except for Straight Ahead) is not all that easy to come by from the local authorities. The data is certainly available, but the time taken to acquire it may extend to weeks or even months, so much for "fast" data.
There's very good high quality digital data that exists for the entire planet, but the next question arises, does the regulatory authority accept it as an accurate and approved source?
When creating OEISIDs, I use all of the approved data, and then check against all other data (including non-approved Google Earth) for any other obstacles that MAY be there. Once or twice, it has paid off. Literally, you can leave no stone unturned (pun intended).
To answer your second question, yes, I do personally visit each ATC unit and brief them on our intended procedures following engine failure, leaving them with copies of the particular procedures in map form. It has surprised me when many (most) have commented that this is the first such visit that they've had, so apparently it's not common practice. (Try doing it in Russian).
Regards,
Old Smokey