You're right autoflight, there is a helluva lot of work on a day to day, runway by runway basis to develop these OEI routes. The crazy thing is that the same thing is being replicated at every airline's offices all over the world (most come up with the same or very similar answers). There will be a helluva lot more work to convince the ICAO states to produce standard, optimised, OEI escape routes for all runways. It would add immeauserably to safety, not only in the performance area, but in the other areas of concern regarding conflicting traffic, airspace etc. Australia has made a good start in providing, in the aeronautical documents forum, obstacle-clear gradients for all runways at all licenced aerodromes, a good and well established start, but a long way to go.
I'm going to buy my pair of sandals, grow a beard, and burn my wife's bra and an ICAO flag on the steps of ICAO headquarters until I get my way. Well, I can dream can't I?