If I was running HBG, I would want the most experienced & skilled WT board possible to make decisions on the future for the club whilst clear on delivering HBG positive outcomes (financial, community, membership etc).
If they were adament on having a team represent the Wests Magpies in the NSW Cup, I'd make it work including for the Wests Tigers brand to have a presence at Lidcombe home games (marquee, merchandise, kid's activations etc). My preference would be to have the NSW Cup team as Wests Tigers but if it has to be Magpies, so be it.
I do think the legacy of Wests Magpies can still be highlighted to an even more powerful effect than having a team in NSW Cup. The club could host a heritage round each year at Campbelltown where the team plays in a special Magpies heritage jersey, there is an acknowledgment of old boys on-field pre-game & a big function for old boys to attend at the game. Roar Store could sell this heritage round jersey each year.
Unfortunately I'm a logical thinker and pride & personal agendas seem to be sacrificing logic in HBG decision making.