I've always wanted to be able to control the second team more ever since I bought FM10 for the iPhone.. If you ever get 3/4 of your strikers injured you'd want to be able to appoint someone from the second team. Right now I've got all my strikers gone, I need a striker badly and the transfer window just closed.. Would be great to be able to promote someone you haven't previously demoted.
Also this not being in the game yet doesn't make any sense, right now you can not control your academy at all. You need to purchase 16-17 year olds and demote them to the second team etc, you do not have any control whatsoever over who you want to promote from your academy..