GKP to CST via LKO CNB JHS BPL will be covering more number of important cities and huge pax.
the only hurdle in this route is JHS CNB doubling. It has already been planned to start a dozen of new trains on this route with numerous trains like Udhyog Nagri, 12108 and GKP Panvel to have increase in frequency.
Whereas I agree via Jabalpur ET is and old and good route too but it wont serve much population of Uttar Pradesh and Madhya Pradesh....
more... Connecting 3 capitals of states, 6 big cities 10 big junctions like Gorakhpur Gonda Lucknow Kanpur Jhansi Bhopal Itarsi Bhusaval Nasik Mumbai is hit on its own.