Low Patronage was the reason as Janshatabdi departs just 30 minutes ahead from JBP and has lower fare. Although I thought JBP will not let it extend from its end rather they will extend this to INDB but to my surprise WCR extended it to Rewa keeping in mind the rush of Rewanchal Express, but odd departure and arrival at Rewa it is still not getting that much passenger although the patronage has been improved.
Now what I think WCR can try is to have it depart RKMP in morning...
more... and Afternoon departure from REWA for 6 months experimental basis and REWA can retain the PM (like CSMT-SUR VB) and check if there is any improvement in patronage if there is then make this change as permanent, of not then revert back to original.