Empty from CBE to TVC ??? Who said ? Trains from North East are always jampacked till end of the journey. In fact couple of main reasons were also the following
(1) Train used to be jampacked from Kerala and there were huge number of migrant workforce from Tirupur CBE, Salem who hardly used to get seats. Dedicated train was a requirement.
(2) From railways point of view, there were lots of incidents of chain pulling etc mainly due to passengers not being able to board which happened many times in SR jurisdiction...
more... leading to loss of time.
(3) Since DBRG-CAPE was decided to be run daily, this was a good way to short terminate 12515-CBE TVC.