I would expect an 8 coach VB to be full always, otherwise it's a failure in my view. If a route can't give patronage to 8 AC coaches, then just run a conventional ICE with say 6 AC coaches and rest as 2S/GN. That will invite tons of more passengers and carrying capacity ultimately increases.
Also, Kothsila and Chandil are just time wasting stoppages judging by the data. They should be removed.