I don't think there's any point. My three big ones took all theirs in year 11. Obviously the girls did more modules that DS, but their gradings were all from the final year.
Actually I'd've been pissed off if they'd done them early. Anyway, it didn't do them any harm and they all did well. as I may have stealth boasted about
DS's words on finishing them this year were 'thank fuck I don't have to study shit I hate any longer'. He's an eloquent young man is my DS 