In all fairness, they had to do something and the idea seemed not too bad. But like almost all things in the middle east, there's no coordination.
The system can't work, because one hour up the road, in the bottleneck of Iraq, the participants need to be separated by 40nm and such separation simply can't work if there are too many of them rushing in at the same time and each and every one has his own Mach agenda!
The poor controllers then slow the Superdupers and the T7s to .78 and push the lighttwins to .80 - what a paradox ....
The problem lies in Dubai and it can only be solved there. Shoving up the problem to other ATC units could work if they would have some sort of communication and coordination. But delegating it to the individual aircraft with a ACARS message is typical EK: We have the greatest ideas, allthough
not practical. However we shove it down your throats and if it does not work we'll threaten you a bit first and finally put down all the blame to you if it fails.
Blame the architects of DXB and EK and solve the problem by completeing Makhtoum as fast as possible.