I suggest the following route:- MYS - ASK-UBL - MRJ - PVR - KWV - DD. The advantages being distance from MYS to DD is 1044 Kms against 1100 via Pune -- less by 50 Kms. If it is via DMM, distance is 990 Kms. Just with additional 50 Kms (1 hour journey), pilgrim centre Pandharpur is getting connected to Karnataka. So far, there is no connection in this stretch. Also, if train goes via Pune, 2 loco reversals are reqd - at Pune and Daund. If it goes via PVR-Kurduwadi, one loco reversal is Kurduwadi is enough.
For Bangalore passengers, from Bangalore to SUR or KWV, a 12 coach link train can be run via DMM-GTL - GR-SUR, which can...
more... join at KWV to Mysore-BBS train with 12 coaches, making it a 24 coach train. All regions of Karnataka can be happy.