he should hire better editors, they are there to advice him. Sadly are all bootlicker's
Oda's main problem (well, more like his story's main problem) is his actual success.
He can do whatever he wants and nobody dares to say criticism into his face.
Some artists need that and Oda is clearly one of them.
Take Prince for example. He came up with his best work when people behind him criticized him and gave him some clear deadlines etc.
Once he was so successful and those people were gone, he wrote his songs freely without any pressure or review (like Oda is doing now) and it was a desaster. Way too long, overcomplicated nonsense.