The problem with changing the flag is that it lacks historical rationale. Imagine being asked the background. "Oh, the Prime Minister didn't like the old one. 'Not good branding,' he said. We had an expert panel. A competition. And this won. Just. It cost millions."
The reason for the change is not uplifting, tear-jerking or moving. It's blah. It's a corporate brand change through competition and public acclamation.
Flag change should be meaningful. The change needs to mark a historical event, like sacking the Queen, declaring ourselves a Maori nation or successfully invading Australia.
Without a critical juncture, the flag change lacks oomph. It lacks punch. It lacks history.
There's no story to tell with the new flag.