Take games to Wellington!!
The Warriors have abandoned us for Christchurch & Hamilton as "home away from home" venues, and we're a capital city too - so synergies there
Rename to the Capital Raiders for a year and take 4 games to Wellington. Really ratchet up the pressure. Start reporting every Health and Safety violation every game, including for fans. Let the ACT government know they're looking at a lawsuit if there are any serious incidents at the stadium. If no upgrade annoucements by 2027 (30 years since last upgrade) - say the club will see the ground as derelict by 2030 and will be moving out of the city. Announce the relocation after the Grand Final in 2028 - coincidentally a couple of weeks prior to the next ACT election.
Play a bit of hardball and set dates. Becuase the ACT government at the moment is just delaying and avoiding. Still alot of bullets in the chamber, especially if they can coordinate with the Brumbies and any future Aleague team (they actually probably would have expanded to Canberra last round if they had decent facilties).
How Dunedin, a city of 136,000, can build a stadium of that quality, but Canberra can't.