I feel that the RF haven't really modernised much, or adapted to recent societal changes.
A generation ago, the "hangers-on", had a rather nice life, essentially being funded for minimal contribution. There was a real sense of entitlement.
Nowadays, in times of recessions, cuts and austerity, this isn't socially acceptable. But they haven't evolved.
Beyond the Wessexes & PA, they really are surplus.
I can see M&H are acknowledging this & trying to evolve, to find a nice with the right balance of charity work versus commercialism. They will be criticised no matter what they do.
The biggest pull for the RF is Kate Cambridge. She really is an ambassador & has fine-tuned her role to a T. She is more popular than her husband (and I suspect more engaging & stable).