Loved seeing this, and it seems everyone is agreed we need more games like these.
Wouldn't take much to have an annual, condensed Pacific Cup & Shield. Really just need to add a final with the winners of the Pacific Tests. Run a Pacific Shield with Cooks, Vanuatu, Solomon Islands etc and give them a chance at promotion. The winner of the Pacific Cup is awarded with a game against NZ at the end of the year, Australia play PNG as a full test and the PMXIII expands to play Fiji, Samoa, Tonga etc.
Not that hard and not that complicated.