Holly Willoughby as a strong woman? She's perfectly pleasant and attractive - but she is a mere conduit for Schofield - a Stepford wife if you like.
She is good at reading an autocue, smiling and rapport with guests - but she's hardly groundbreaking or strong or talented. If she were to retire tomorrow, there would be plenty of others who could replace her. She's almost an automaton. Nothing wrong with that; she fills a void, but that's about it.