That is one of the reason why him keeping the exoskeleton makes no sense. He couldn't put CoA on because he didn't wanted to hurt BM's hand, now every women that punches him would brake their fist...
Sanji would blame himself for that.
But now this is actually something new, now Sanji may put more efforts on being more racional and less emotionaly driven while saving a lady in danger, his body is tough even without haki
Sanji got so damn worried and shocked with the supposed "sexual abuse trap" that Black Maria made that he couldn't afford to use CoO and not get kicked by Gifters. We know since Katakuri how being shocked and emotional makes your CoO work poorly
I was even thinking about Sanji struggling between these 2 versions of himself on the way he and his siblings treat women. The first thing Sanji remind when he realized he beat that innocent girl was his siblings beating Cosette unconscious, pissing Sanji off completely
So now this evil side of Sanji could be constantly fighting with his good gentleman side, since the Awakening seems to be complete according to him (and yet he beat a girl). Obviously his good side will prevail, but the way he faces female enemies, alongside with the Exoskeleton toughness, could drastically change for now on