Key PointsNot for the first time, an activist investor is pushing for major changes at the amusement park operator.It says that management needs to better exploit the value of its considerable property holdings.10 stocks we like better than Six Flags Entertainment ›Is Six Flags Entertainment (NYSE: FUN) about to undergo a radical transformation in its business?If an activist investor in the amusement park operator gets its way, Six Flags could morph into a new type of company entirely. After said investor p ...