True that DGHR/JSME won't fill it on its own but, we have more places on the KIUL - GAYA section to be connected to DGHR and BSB. JSME would get a good connection towards Sheikhpura( not sure if it would get a halt), Nawada, Gaya, Dehri on Sone, Sasaram, DDU, BSB.
Let's wait and watch for the official notification.