Exchange of information and ideas between controllers and pilots is the best way to iron out these questions. In my previous airline controllers would often attend our CRM days and the amount we learnt from each other was fantastic not to mention the time spent by the controllers on the jumpseat. I was lucky enough to have a day watching these guys and girls at work in the London TMA and the job they do there is outstanding
I feel for the UAE/ Dubai controllers as quite frankly the standard of RT used by pilots in these parts of the world is shocking and something that controllers in Europe do not come up against very often