I regret reading the One Piece manga; now my eyes have been opened to just how much filler is in the anime. After every scene I find myself commenting something like “wow that was half a page in the manga, why did that last 10 minutes?”
And I understand that the anime is currently very close to the manga, but if the anime were to keep at its current pace we probably wouldn’t see an end to the Big Mom arc before the end of 2018.