I’m pretty sure that he can create great short mangas on a conceptual level and make the characters really great/likeable. Oda can create far better character writing if he really wanted to, you can see how he handles emotional beats in One Piece. Backstories are great, and payoffs are great especially during pre-ts. He handles the characters well enough even though there’s too many of them. Like a random side character within the arc can mog a main character in JJK in terms of personality and development lmfao. I’m not even joking.
Emotional beats is not everything in character writing , oda might be good in emotional writing but sometimes he would overdo it ( kuma backstory )
he also isnt good in writing complex characters or being consistent with them .
Jjk isnt a good bar , that manga is only good in fights .
But i really doubt that a random side character is better than yuji in terms of character writing.
Oda is good in emotional writing , world building and hype.
He just cant write complex things.