I've traveled in Gwl-indb ice end-to-end, no doubt there is a huge demand for Gwl-indb. Obviously no one would like to go via Bhopal. But the problem is that gwalior-maksi route is very slow.
512 km in 12-13 h is actually slow, who would prefer it in daytime when they go through road in around 8 hr. Another train after Indore ice during night can actually do wonders.