We are all aware of the limitations of ATC but I would suggest it is the self-imposed rules it puts on itself. This is probably because of the lowest common demonitors working control but a good look at LHR, CDG, ORD and their min separation would help us out greatly. If a contoller can;t handle traffic like the rest of the world then get rid of them even if they are local.
Dubai is not even the top 50 of busiest airports for traffic and we always have delays arriving. It is time for ATC to look at itself and correct the problem. This will help out everyone.