Why only 9 or 10 games at the new stadium FFS? Surely they'd have to play every game there, otherwise it would be hard to justify building it if there aren't going to be two permanent tenants (Rovers and Tigers).
As for keeping Balmain happy, they've done well with the name, not many people call the team "Wests", they even kept their colours (basically). Maybe one game every couple of years at Leichardt. Surely it's time to settle in one place and build for the future? That area around Campbelltown is massive and much more important to Rugby League than the oft mentioned Central Coast.
Even the Dragons are seeing the sense in putting down roots in one place, making Wollongong their full time training base (at the request of Mr Bennett).
The stadium would almost be a certain goer for the World Cup if the Tigers were to plant themselves there full time. Govts would be more likely to fund something that is:
1. Providing a new facility to a large growing area, that hasn't got anything like it
2. Have year round NRL and A-League use
3. Assist the Australian WC bid, as technically it would not be classified as a "Sydney" world cup venue. A bit harder to pull that one off with Blacktown / Liverpool etc. (FIFA allow one city to have 2 venues).
Actually, I've got a better idea. Build it in Wollongong, let our team in to the A-League, and encourage the Dragons to make themselves at home ;-)
And Milf Keneally can follow up with a MagLev between the Gong and Central... and fix all the hospitals while she's at it!
We'd provide a much more picturesque setting to beam around the globe for a WC too!