Growth Growth Growth. They only real solution to Nintendo's issues is to get far more developers for their platform. If they can't rely on 3rd parties they have to make 1st party larger.
Some of those studios and employees need to be very familiar with HD production so that they can help Nintendo native teams streamline that process.
Then they wouldn't have to worry about hardware parity and can focus on making great games faster which is the only thing that can help their platform.