If the airport congestion gets to bad then they will just bypass it. If you can't spend the dollars wisely with the high traffic movements what will you do with no traffic? Operators and clients alike are doing something now. They aren't going to change their times. Just change their hub and bypass your mess. Lost revenue for the airport and then nothing will get fixed because they can't afford it.
F70's crossing the country. Using different hubs - Alice, Adelaide etc. Upgrading mine strips. ADSB. The clients and operators are finding their solution to your problem. Just don't go there!