So 'nimmer', what would be your wish list? I've written written in to the company about the waste of fuel the F270 requirement results in and their reply was it would be opening too large a can of worms with Tehran (and I suspect Abu Dhabi). Tehran lets them use some of its airspace under the current arrangement. If they insisted on retaing all their airspace, it would result in even more chaos.
Does 'Wiley's' suggestion of a close in hold over Sharjah have any merit? Looking at the area chart, it would seem that a 120 inbound right hand pattern over Sharjah would allow easy streaming for both Dubai runways, much the same as Lambourne does for Heathrow, and a min holding alt of 6 or 7000 would mean it would have minimal effect on Sharjah itself.