I think Gold Coast should take Mathieson and Tucker with its first two picks. I think Gold Coast need a Callan Ward type to be a reliable inside presence that frees up Ablett, O'Meara, Swallow and Prestia to do damage outside. They don't have to be amazingly skilled, just strong, honest, consistent and fast with their hands. Mathieson's better than say Oliver because he has done the business for two years, while Oliver performed for half a season. I think Mathieson's style would suit GC's midfield better too.
Tucker gives you a pure outside runner. Garlett, Saad, Hall, Matera and Jack Martin aren't really pure wingers, but Tucker probably is. He helps your kicking issues and gives that run and carry that Rocket loves.
Touk Miller, Jesse Lonergan and Rhys Mathieson is a great core of inside players. Swallow, Prestia, O'Meara as inside/outside types and Matera, Hall, Garlett, Martin, Tucker and Saad as outside types..... this is going to be one hell of a midfield