Better to extend 12923/24 and 12913/14 to Raipur/Bilaspur by making it run daily or 4 days a week having slot sharing with 12772/71.
Indore already has a flop 19318/17 to Raipur/Durg with flexi-fare and slow TT which is of no use.
Amarkantak is a dedicated train to Bhopal and Jabalpur where ticket availability in past few years is a real issue. Extending it to Indore will reduce quota for Bhopal and Jabalpur both.
Already...
more... railway has stopped Mahanadi Exp. between Bhopal and Bilaspur via Nagpur which was a very good train.