I'm going at it from a different perspective: Imho Oda's worst "aspect" is that he takes way too less breaks/hiatuses specifically to think and plan the story.
We saw that the recent output after his longer "4 week planning break" has been noticably better than the stuff he came up with before. Way better paced and coherent.
Compare that too the nonsense we got at the end of Wano (well, the entire raid to be fair). Same thing with the endings of Dressrosa and WCI.
Oda writes those long arcs in almost one go (one break every 4 weeks is basically nothing tbh) and it always shows in the second half.
He starts out nicely because he has cool ideas and is very talented at worldbuilding, but when it comes to wrapping those arcs and introduced storylines up in a smooth way - things that actually require good storywriting - Oda falls short, because he never takes his time to actually plan the writing in a proper way.
Oftentimes he is like a talented student in school, who has to write an essay in a 4h test. The student is creative and full of ideas, which he introduces all at once without a proper writing plan. It works fine at first of course, but the student can't stop and suddenly he realizes that he only has about an hour left to wrap and tie all those ideas up in an actually well rounded essay. That's where a writing plan would be absolutely essential, but of course it's not there and the student has to improvise.