I completely agree with King of Calzones. I wouldn't argue, at this stage I can't be bothered picking out what is wrong with One Piece's animation but instead I'm constantly wondering what the hell is going on inside the company.
Episode of Merry and Dragon Ball Kai are two products that shouldn't exist yet Toei want to push these properties out so fast that they can barely live up to expectations.
If 'One Piece' seems badly represented it's down to Toei Animation's work ethic. Employees that are so distant that the ones making the biggest decisions are the ones making the most money, yet they do the least work and are probably clueless about their properties. I bet if you compared everyone's role in Toei animation with their wage and the work they put in, it would paint a bigger picture.