It's not apparent in gameplay, because the story isn't ever going to force someone to play jobs, but promotionally, the WoL became a Samurai and learned Far Eastern katana techniques, and then beat Zenos with Zenos's choice weapon.
Zenos's three katanas also represent the elements inherent in Red Mage's casting line, not all of them mind, but hey Thunder and Wind. Veraero and Verthunder are RDM's strongest standard spells. Then the Ame-no-Hibikiri is just "Sword" elemental... but it's all blood red like the enchanted combo. Red Magic was born from Ala Mhigo, and is a near extinct art for the WoL to bring against him, if you played it for the MSQ.
Most of the 70 capstone skills in Stormblood were powerful battle techniques that no one else in the world can do, or at least very few. Nastrond is something only the WoL and Estinien can do. The Blackest Night is something only the WoL can do. It's not true for every job, but with the various job questlines, part of the gameplay of Stormblood was taking new techniques with major reworks/job gauge introduction. Paladin got Requiescat and Holy Spirit, and as shown in the tournament, it seems to be the WoL's signature special sword style, compared to Bronze Bull and his Boulders, Handeloup and his Holy Orb explosions/Heavensward style sword skills, and then finally Black Lotus who had a mix of the old Gladiator sets, tornados, sanguine blade, and even heckin' Plunge from DRK, despite being a GLA.
I felt like most all of the jobs went through something big in Stormblood. Not Zenos levels of big, but training montage big is pretty great.
There's also something to be said for getting to fight Zenos twice, and see the majority of all of his skillset. Then living to tell the tale, twice. He didn't grow at all during the course, only revealed more and more of his true power. With the WoL being an insanely skilled fighter of multiple disciplines, the only real gap between them was raw power.
Anywho, not trying to persuade you to like him, just what your post made me think.