Sanji is a master of both Observation and Armament Haki, with his Armament Haki being very refined. Sanji will gain the Haki to bypass immortality, an important power-up for him in the Elbaf Arc ...

Sanji's image is altered by Toei through unnecessary additions and changes from the manga. Fans criticize Toei for distorting events, adding filler, and mishandling Sanji's character in the anime.

Even Sanji’s Observation Haki is considered one of the best in the entire series. Hence, even if Oda decides to grant him Conqueror’s Haki in the end game, Sanji may not need it after all.