Oda is scaling Zoro and Sanji through Luffy's gears
He needed Gear 2 to beat Blueno
Meanwhile Sanji broke Blueno's Tekkai already in Water 7
Zoro and Sanji defeated much stronger opponents than Blueno, and were already competing with them pre-Ashura and pre-Diable Jambe
It's no surprise Luffy is using Gear 4 while Zoro uses Rengoku Onigiri
Stop crying Luffytards