I think has bad instincts.
She initially supported joining the war on Iran and has tried to walk that back, with unconvincing attempts at rewriting her initial position.
She was a leading pro-Brexit voice, which the public now widely recognizes as an obvious mistake.
At a time when most middle-powers are recognizing the error of having become too economically reliant on the US - leaving us vulnerable to being abused by its trade policy - she wants to further place all our eggs in the US basket, increasing our dependency on it.
It was one thing not to see the error in this approach back when the US was the undisputed superpower, that fostered mutually beneficial relationships with its allies, but doubling down when we are in an increasingly multi-polar world, where the US is taking a more extractive approach, strikes me as strategically dismal (and honestly, a pathetic vision for the future of the UK).
On world affairs, I think she would be a huge downgrade from Starmer.
To her credit - she is a good speaker and reasonably charismatic, and isn't anywhere near as likely to catastrophically damage the economy as Farage (and find her to be more sincere and less obviously self-serving than he).