Oh my god.
Couldn't even slice Sanji's head off and his exoskeleton is so much inferior to BM's natural durability, 5 years old and she was already snapping Giants' swords.
Sorry but Oda already gave us an answer on what "two-shot" means.
Queen returning back to his base form seals it. Just because he has quick recovery doesn't mean he wasn't lights out for that time.
O-Lin >>>>> Queen and that could not be made so much clearer. She three-shots him down for good if not distracted by food.