I don’t know about her office qualifications, but on a scale of one to ten, I’d rate her about a ten.
Used to watch her in Kansas City for the seven years she worked for WDAF. She is a very professional broadcast journalist. I like her neutral competent presentation. I know people that worked with her and spoke highly of her.
While I know of no diplomatic experience or similar background that would qualify her as SOS she would certainly conduct herself better than the last two holders of that office.