I repeatedly hear that it would be incredibly hard for GW to publish a new set of BB rules themselves as they (as a company) do not own the rules - Jervis does in conjunction with some of the old committee members do (or so I'm told).

Rules wise all they really need to do is fix the Claw, Pile On, Might Blow combo. (known as C-POMB)

Mini wise they need a complete revamp as you can get better for cheaper - unless you have to play at GW like I do