Based on your argument, then Zoro cutting King's Dragon is also Repetition cuz we already saw him cut Punk Hazard's Dragon.
And if you want to discuss Techniques, check this out
Monster Trio were given Three Tools before Raid that will help them discover their New Power-Up (Dormant Power)
Sanji was given Raid Suit, Zoro was given Enma & Luffy was taught how Haki Flows (Ryou)
Luffy was overwhelmed by Kaidou, Zoro was overwhelmed by King & Sanji was overwhelmed by Queen
What happened then? Luffy Unlocked Adv. CoC, Zoro Unlocked Adv. CoC too & Sanji Unlocked Exoskeleton or Germa Genes
However this is where the Difference comes in
Luffy used his Strongest Technique enhanced by his New PU (Over Kong Gun) & it failed to Defeat Kaidou
Sanji used his Strongest Technique enhanced by his New PU (Hells Memories) & it failed to Defeat Queen
But Zoro used a Finisher enhanced by his New PU & it succeeded in Defeating King
After that, we have Luffy Unlocking Gear 5 & Sanji Unlocking Ifrit Jambe which not only are the Next Level of their Signature Technique, but also their Peak (Blue Flames are the Hottest & Luffy said Gear 5 is his Peak) & they also mirror their PUs from Enies Lobby
However the same thing didn't happen with Zoro, he still missing his PU which represents his Peak Quality & also mirrors his PU from Ennies Lobby, and conveniently we have a Shinigami Sub-Plot going on with him (It's similar to how Sun God DF was teased before finally revealed)