Better to extend INDB-NGP Exp. to BSP and run it daily for convenience of passengers travelling to DURG/R. Indore is also directly connected to Raipur with daily 2 flights.
Amarkantak on the other hand runs to its full capacity and extension to INDB will affect JBP passengers who only have one train for R/DURG. Also Amarkantak always arrives 1-2 hrs late at BPL.
Instead of INDB-PURI "HUMSUFFER" they should have introduced a SF train because nobody wants to give extra money for dynamic pricing and long travelling time.