Imo this arc Oda has done something both unique and lazy with Zoro and Sanji and more so with Sanji.
What I mean is that right now Sanji has the RS and seeing how this all is getting set up I'm now 80% confident this suit will play a key role in Sanji gaining a win against someone YC level strong.
Personally don't mind this development, just saying it's a bit lazy on Oda's part. But what can he do, they had so little time before the big battle and needed to get stronger asap.
He mostly focused on Luffy so far, who is actually legitimately training. And less so on Zoro, who is not exactly training but more like getting used to his new blade. As for Enma pretty sure it's a major upgrade for Zoro, not simply a new tool but a better tool in this particular case.
The qualities of Enma definitely give Zoro a significant advantage as compared to Shusui. The reason it's less of a lazy writing is that Zoro is one of the very very very very few people who could potentially tame the problem child that is Enma. And one of the reasons is his long lasting relationship with Wado Ichimonji.
As for Sanji, I have speculated that he might as well have a similar genome to that of his siblings except there would be all of the mutations conflicting with each other which allegedly lead to them being inactive this whole time, something along these lines. And Sanji battling Queen('s viruses) could potentially give Sanji the necessary stress for these genetic enhancements to take place.
I'm leaning towards this way of thinking for a couple of reasons. Overall we see that Judge and his offsprings all use a very similar fighting style. Sanji is a bit of an exception because he was taught not to use hands in battle, but aside from that they all fly, move swiftly, use kicks and elemental or other enhancements on their limbs. Fire for Sanji, electricity for Niji and Judge, explosions for Ichiji...
Sanji even got this surprised expression on his face when he first saw his dad's electrified foot. It could be just him fearing that the attack will injure him... But it felt like he saw similarities in their respective fighting styles.
I can easily see Sanji utilizing electricity, fire and explosions with his current fighting style. One leg on fire and the other is covered with electricity.
But of course I could be just reaching, lol. After all it was part of this whole narrative that Sanji was born human and not super human thanks to his mom.
And yes King Moe, I know that Sanji is getting stronger even without his suit, and his haki must be getting stronger too. That's not what I'm arguing against or anything. Just wanted to say that just in case...
