I guess the biggest issue is the congestion between ERS-TVC. A superfast train like kerala express has been alotted almost 6 hours between ERN-TVC despite saving time on engine reversal. Getting path in this route seems difficult. Instead of TVC maybe they should look at ERS
From PGT towards ERS, after Palaruvi express, there is no train till night 10pm. A train in the evening till ERS ( SA-ERS intercity) around 6pm will really help. This was proposed many times as only one rake is required and path is relatively free as well