I noted that in CASA's May 2009 paper one of the recommendations was to apply "business controls to limit (or manage) traffic movements during the daily RPT arrival and departure peak periods to those levels experienced in the Dry season 2008. BIA has agreed to implement these controls."
"Business controls" sounds awfully like "send a price signal"
Airpsace reforms will still just be moving the bottleneck until the lack of full strength parallel taxiways (identified as a threat) has been addressed. But I guess that's infrastructure spending that nobody wants to make.