I feel VB cannot be limited to 360 Kms one way journey. Minimum 500 kms required.
MYS SBC is golden route. SBC MAS also golden evergreen route.
SBC MAS SBC Shatabdi timings is a problem for Bangalore traveller's in almost all areas -- be it JP Nagar, Banashankari or Domlur, Marathahalli Koramangala Yelahanka etc. Early morning 4 one has to get up and catch taxi to reach SBC. Ditto problem when you reach at 2230 at SBC. One more hour of travel and a hole in...
more... the purse!. Anyway journey time will be 7 hours end to end. Buses are readily available round the clock for a fare of around 600 to 1000.
Considering this, if MYS MAS VB starts at 0900 at SBC, can prove beneficial. Anyway breakfast and lunch are taken care of in VB. Similar advantage while returning also. After 1330 no train till 1530 from MAS. So VB can start by 1450 or 1500 and reach SBC by 1945 2000.