Why wouldn't it be tho? After all Oda called both shameful and suggesting something that's worse than one of the two things called a mark of shame is correct. Why would Zoro need growth now? It didn't happen the last 400 or so chapters when he was way weaker
A wound on one's back is way more enforced in the story than a one time scene with Mihawk about nicks on a Blade being shameful.. That's mainly why..
Every character always need growth, that's what make them better, seeing Zoro having a hard time against King and Enma made it more satisfying when he unlocked CoC and tamed Enma.. I know it's a fight, but it's the same for his character as a whole on the path for the World Strongest Swordsman.. Struggles and overcoming it creates greatness..
His fighting style, one attack from Mihawk is different than actively trying to break Wado.
Not very convincing.. No sign it was working on Wado, he did withdrew Sandai though..
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How does a weapon make any difference when the user isn't strong enough too make a difference? Loki is individually weaker than Kaido or Big Mom. The most you can say is, Loki can pull off some special attacks that are stronger than Kaido/Big Mom's individual attacks, which is far fetched but still acceptable because he's got a special weapon. Surpassing an attack that required the combined effort of two Yonko is a different realm altogether.
You assume strength is the main factor in breaking Meitou Blades at that level when it's Haki.. The key reason Zoro was able to cut down Pica's hardened body was Zoro's Haki coupled to his Swords cutting abilities.. Zoro's strenght played a part in it but it wasn't the central part..
I'm calling it right now, Loki's blow with Ragnir will Shatter Hardened Sandai Kitetsu from the inside out like CoA Internal Destruction..
And i also think Zoro's Dragon Damnation would cleave Hassaikai the same as it did King's hardened Blade..