It's a fact reality, Bus Lobby charges exorbitant premium fares on Bangalore-Pune/Mumbai route, even a Single addition of a Triweekly Superfast will lead to drastic reduction in fares for this route.
Check a Live example on Bangalore-Jodhpur route currently, Bus fares are almost equivalent to the costliest train on this route (Humsafar Express) and with running of Specials in this season, fares are drastically reduced to 2400-2500 range now, which used to cost over 4-5k till last year.