Guess you all are familiar with Jade's recent blog about questions to ask Oda.
This blog is similar in approach but different in execution.
You can tell Oda to do certain things differently in canon One Piece (fillers excluded), like to draw certain characters differently (e.g. draw Nami with flat bust) or change the storyline (e.g. have a certain boy with a broken tooth to survive a certain incident).
Basically this means you can amend the storyline where you think should be something else or a certain character's design to how you think it should be, in short you tell Oda to do it THIS way.
What will you tell him to do?
p.s. I'm sure many of you are aware of "THAT" exhibition, yes? I found some links about it and shared it here in case you may want to take a look.