Railways should remove 2-3 second sitting coaches from 12991/92 and add 1 3ac and 2 sleeper. As you can see in screenshots more than 600 seats are empty and 3ac is going in waiting but in udz asv and jp udz spl sleeper and 3ac are getting booked fully so railways should make this train coacj composition like udz asv and and add only 2 or 3 second sitting coaches with extra sleeper and 3ac.