yes u r right. Atlest some patna trains should have been diverted via Gaya so that the purpose could have resolved. A new Humsafar Train from Patna to Banaswadi (Bangaluru) is going to be started in few months. May be It could have been run from Patna via Gaya - DDU - Cheoki - Jabalpur - Nainpur - Gondia (after completion of this new route which is scheduled by June 2019) - Nagpur - Warangal - Vijaywada - Guntur - Nandyal - Dhone - Pendekallu - Gooty - Kalluru - Dharmavaram - Yelahanka - Baiyyappanahalli - Banaswadi (Bangaluru). It is around 2600 km from this above mentioned route and less than usual route.