Yoko Yoko is a nobody. He doesn't do anything for Shin, he's just an enforcer.
He is the right hand man of the number one general in Han, highly probably
EDIT: definitely a general himself, and seemingly inarguably the strongest warrior in Han.
Shin slaying the best warrior in Han >>> Shin being gifted Tou’s sloppy seconds in the form of Enkan 2.0.
We knew Raku'A Kan was Han's top general so anyone else was going to be automatically capped.
Hara capped Yoko Yoko as a general, but never as a warrior. This 7 foot tall hulk can really be as strong or as weak as Hara wants him to be, and that makes for a far more interesting and entertaining opponent than Hakuokoku who already does not seem very interesting as a Shin antagonist.
I disagree, experience is part of the totality of a General's attributes, an increase in experience would inevitably result in a level increase.
Experience is great but there is no amount of experience that will make En Heavenly King level. There is no amount of experience that will make a character who has very probably already reached the peak of his abilities as a general like Rokuomi transcend the level he’s currently at (strong general) and ascend him to the level of the Heavenly Kings (great general caliber).
Still, it is not the only thing that Rokuomi can gain, the study and application of new strategies is one of the solutions for its evolution.
You can just assume that Rokuomi can learn new strategies, but Hara has always put limits on the amount and complexity of information that characters know.
Take Akou for example. He spent
decades with Ousen. Yet, Akou was only capable of utilizing
some of Ousen’s tactics. Why couldn’t Akou learn
all of Ousen’s tactics? Well, because Hara said he can’t. Hara placed a limit on Akou’s IQ to prevent him from learning literally all of Ousen’s tactics.
So you can assume Rokuomi can learn new strategies but what benefit does that provide him? Is the simple-minded Rokuomi, who Hara turned into a gag for his hard-headed, more simple-minded nature, going to learn strategies that cause him to completely transcend his level as a strong general? The answer is no.
To do this you would need to demonstrate a causal link between the premises that underlie your thinking and the conclusion obtained from the relationship between these premises.
My causal link is that I have consistently proven the entirety of the Kingdom fandom wrong with my correct takes lol. I have methodology but I don’t feel like getting into that right now lol.