More of a general BBC comedy rant, really.
Even if you take as read, which I don't, that all-male Oxbridge acts are the best source of sketch comedy, haven't you lot at the BBC noticed that 2 front men is not enough competition to produce a funny result unless the 2 front people are incredibly experienced performers, as in the Morecambe and Wise/post-war generation?
Without the pressure cooker development of all that live work, you need at least 4 front people to get enough of a competitive atmostphere going to chuck out the unfunny stuff. Viz Monty P, Not the 9, Mary Whitehouse, Goodness Gracious, League of Gentlemen. Compare and contrast with French and Saunders, Smith and Jones, Fry and Laurie, Armstrong and Miller, Hudson and Pepperdine, Mitchell and Webb, etc etc. The most recent M&W is full of extremely tired stuff that needed to be CHUCKED for the new series, plus, God help us, a sketch called 'Sketches We Couldn't be Bothered To Write'.
Perhaps you could establish a regular slot, say 11pm on a Monday or something, called The 30-Minute Revue, basic stage and live audience only, and send all the Oxbridge double acts to fight it out in a comedy bear pit so that what survives is ACTUALLY FUNNY.