The 2015 MLB first-year player draft is over...I think. After 40 rounds, I begin to check out. When it comes to the usefulness of these players selected, we won't know their true values until many years down the road. Even first-round picks rarely make it to the major leagues the following season. This is a process.
That is why the common refrain among analysts and fans is for teams to simply take the best player available regardless of position or need. When said player is ready to play for the big club, whatever block or previous interference was in the way may no longer exist.