Puru/Utkal got 27%/21% common route against 60%/68% for Kamrup/Dihing (100% common run of Kamrup/Dihing till last run of both train)!!
Even if Dihing would run after service resumption, its 100% common for NCB-HWH/KOAA for your locations, as you pointed other blogger based on his location!! And you are bothered for NCB-HWH & dont care route taken by train in between DBRG to NCB!!
And you already know the reason: Its no Spare Idle Rake left to run this weekly SF & if this train was making money, Vivek could have got canceled instead!!