While we praised One Piece for all the good it has, one must understand that everything has flaws and One Piece has it's shares of flaws. What in One Piece disappoints you?
Mine is an old disappoints in One Piece is the Straw Hat Pirates arrived at the Red Line in chapter 490 after visiting over 10 islands (not counting Sabaody) and defeating only two Shichibukais. Also lack of deaths
How about you guys?