Another reason is Dhauli exp. as both the train run in combined Dhauli having 14 bogies and rupashi with 8bogies Dhauli simply cant cope with huge flux of passengers with only 14 bogies. after they are separated now Dhauli with 22 bogies can bear the pressure of passengers and with far far greater patronization than rupashi, Dhauli obviously able to keep the morning Hwh slot and rupashi start to originate from SRC.