Basically it`s all to do with the Glidepath sensitive areas on all runways when we go down to single rwy ops. 12R is the worst as you can`t hold at M4, K1 or K2 and you can`t taxi on L3 or L4 with inbounds so we immediately try to change it to 30L even with a small tailwind component. K4 definitely helps for departures in the case of 12R ops.
30R we can`t use M19 and K16, jetblast from here effects the Royal Hangar.(Close the door Hello!!)
30L can`t use N9 and N10 traffic from the north side has to be lined up before an inbound gets to 7 miles so we need 10 mile gaps. There`s more but I won`t bore you, suffice it to say that when it single rwy ops we have to push things to the limits that we are permitted to use.
Oh, if you ever meet a Dubai Atco who tells you that he enjoys the challenges of either 12L or LVo`s immediately punch him in the mouth as he is lying!! This also applies if you meet a Radar bad who tells you he actually knows the required spacings!!