Rz,
For me the cape is North!

All kidding aside, I do believe that the Cape is more a showcase league. It is more of a sophomore league, for various reasons. Juniors are not asked if they are expected to be drafted that June. And many of their players go to Omaha, and join late and are tired from the long post season. One parent told me they love having an Omaha player on the team, but it seems to hurt in the beginning more than help.
It is unusual for a freshman to go play at the cape. I do know of one freshman pitcher who was having some confidance issues and returned from the cape a different pitcher. Also, quite a few lower round drafted players head there before they finish negotiating their contracts, for the chance for a bit more $$.
Many who go to the cape don't need instruction, but to work on stuff they didn't get to during the year in real game situations. Or if they do, the college coach will let the coach know what needs to be worked on and will also let them know how much work they want their pitcher to put in. If mine had gone as planned he would have put in 30 innings max.
Position players are sent so scouts can see how they adjust to the wood for the draft. Many scouts also put in requests to see certain players at the cape.
It doesn't have the greatest facilities, but the cape is what it is, and that's the mystic that sets it apart from others.
JMO.