It's frustrating to sit and watch the beautiful stream you have worked to create go to hell in the terminal area
Sorry Ferris, musta been having a day off when you achieved that beautiful sequence
Seriously though I do agree that what Dubai needs is a dedicated flow controller who works out the sequence and then works back from that with times to arrive at the respective gates, which then leaves it up to us humble area controllers to meet those times and with a bit of luck the sequence would run smoothly.
If that is too much to expect then have a coordinator who selectively asks for 20 NM's between certain aircraft rather than the blanket 20 NM's or 30NM's between all aircraft after they have lost the plot and the poop has well and truly hit the fan.