ATM, the way the system is set up, Nth and East sequence independantly. The only way to get extra spacing is to call for 20nm etc. Flow shouldn't be run from the centre. This is very inefficient. It would work if east was given gate times ie. number 1 cross BUBIN at 34, number 2 at 39 etc. There has been some ad hoc experimentation recently by a few of us re; coordinating gaps in the west sequence to fit AUH and east arrivals. Whilst a marked improvement, it still doesn't cover all bases, and if you-know-who found out we weren't doing it his way, we'd be toast.
PM me for contact details of the EAA people.