Correct. Both Venad express and Kerala express can almost reduce their running time by almost 45-1hour minutes if they skip ERS.
As of now in case of Venad express, from the time it arrives in ERN and then departure from ERS after loco reversal close to 1 hour 10 minutes is wasted. In case of Kerala express, from Aluva to ERS 1 hour running time is given to cover just 20km. If it would have gone from ERN itself, the train can easily reduce running time by almost an hour !!