I think Diving Duck is not really questionning the A330's low level so far away from touch as to the pilot's questionning of the speed control. If you're number 1 we need you to go fast whether you are high or low. If you're number 1 but your priority is to fly slow and conserve fuel we can make you number 2 however the extra track miles would defeat the purpose.
Dubai has become a very busy airport, (not Heathrow busy acknowledged), but busy enough that we (as controllers) can rarely accomodate everyone's desired profile. We would if we could, we are on your side, really!