Came to post that. It seems like Giolito is gonna continuously hover around 3-6 in any prospect list, simply because he is the best pitching prospect and you tend to know what you have with them, whereas hitting prospects can jump a ridiculous amount, such as the aforementioned Robles (whom I predicted would end up being a top-50 guy, bet he goes to Hagerstown in September).
EDIT: I think the biggest thing is they now have Turner at 60 FV; he was just 50 FV before the season. They think he's a future all-star