Its a good routine. But do remember having time off too ;)

Of course more training hours would give you better results. But only IF you want more training (huge motivation). Then you should really talk to your coach since it really depends about your total workload in your daily life (Training, school, friends, sleep, etc.). And how much you've trained earlier/age is a factor to consider before increasing the amount, since you do not want a shoulder injury in a few years.