Stop switching to different reasons when you are no sure!! Doubling/Electrification at different Stretch in DD-SUR keeps ride Non-Smooth as Main/Loop switch (X/O) abrupt constant speed to add friction of Acceleration/Deceleration with wobble effect of Loop-Line against double HG-BJP with hardly any intermediate Main/Loop Switch!!
CNB-LKO is FEDL with painful ride against CNB-NDLS/LKO-SLN as Freight strand at Main & M/E move via loop which creates same impact as detailed for DD-SUR!!