I agree and I think Katty Kay is too - I'd put her down as an outside bet to replace Jon Snow actually, especially as she has a long working history with Matt Frei.
From what Matt Frei is a friend of hers and he got her into journalism. They both seem like they have good chemistry. However I don't think she'd be leaving D.C. anytime soon as I think she has kids still in school and her husbands works as a communications director for a think tank.
100 Days would have been really worth having tonight, coming off the back of the press conference between Trump and May. As it is the 7pm hour on the NC (and presumably World) is still coming from Washington, but branded as a standard bulletin.
Interesting on 100 Days, they've let BBC Four go but are continuing to simulcast with World for the Article 50 vote in the Commons, rather than go to the break and do their extra NC bit before the NC weather.
Maybe once the BBC have conducted a face to face interview with President Trump? There's no law to say they have to display a image of the President of US on the BBC Countdown! Things don't have to be replaced like for like- it's merely a countdown showing some of the things BBC news reflect on