WDP-4D replaces a WDM Loco. The track doubling between Zafrabad Jn and Barabanki via Ayodhya - Faizabad will also start in a while and the
#EDFC may also develop between Dhanbad and Mughalsarai. So within a few years, this train's schedule "may" be speeded up. IR may be thinking of extending this train along with the Himgiri Express up to Katra (SVDK) in a few years time. By that time the 22313/22314 SDAH-SVDK AC Superfast Express may also start running :-)