ND you are not quite right, in fact, EK have a company notam recommending 12R use where possible to increase the traffic flow rate.
ARMGAT, 12R at 2650m increases the thrust required to miss the obstacles at the far end but still gives you 4000m of concrete to stop. Most local operators use 12R unless they are either luddites or at MTOW. It is a TODA obstacle (sandhill) limitation rather than a TORA/ASDA problem.
Ghost