the BBC one who always seems proud about her ignorance and seemingly doesn't try to learn.
Ignorance or just asking the sorts of questions that the more casual viewer would ask? Kat Downes is a general sporting journalist and she covers other sports as well. Robin Cousins is the expert but it's common to have a less specialised sidekick in sporting commentary. I think that approach makes sport more accessible.
Mark is good at commentary but the skating 'techo babble' could be offputting to someone who only watches the bbc coverage of the world championships once a year or even just the Olympics every 4 years. It's important those viewers are served as well- the BBC is meant to be a public service.