I guess RB itself didn't felt like its required considering the Diesel Sections domination in SWR and LGD and ED/AJJ/RPM has been given the task to provide required e-locos for the SWR trains ...all the Chennai bound are taken care by ED/RPM and all BZA/SC bound by LGD except the Rajadhani which is running with GZB end to end now..
will have to see how they are going to deal with the case as they started electrifying the sections on a rapid pace to reduce the diesel bill