Yep, why is the main question here. I hope Monaka isn't a bluff too though (unlikely as it seems), so I won't be as disappointed by the main outcome.
And I hope nothing much becomes of Cabba, even after his fight. He's just not that interesting. I agree too that Vegeta shouldn't have to go super saiyan blue against him, but they'll probably use the kind of logic Inhuman pointed out for the reason for it.