There is a division in Isando that does the STAR's/SID's and the route matrix ("Airspace Management and Planning", something to that effect),it consists of EX-ATC's and to the best of my knowledge their is input is from ATNS,Airlines,Acft Operators and of course the CAA. As to the dilema of the Okted Dep of RWy01 it was proposed to to be changed during 2006,where that ended up i have no idea.