It's the 'Davina' Syndrome at work again -
this is a term for the condition where Commissioning Editors confuse the appeal of someone either as a character or as themselves in one show, and imagine that this appeal will automatically translate to another entirely different show.
The results are a disaster, and even though they know this - as in Davina, originator of the condition - they are foisting her on Radio Two listeners now, with predictable results.
I wouldn't shoot AC - just have a quiet word with his agent about sticking to what he is good at.