The POY - PLNI - MAS express have an inconvenient departure from POY & UDT. Also, the train is taking circuitous route.
So, PGT/PGTN/POY needs a ONT to Chennai Egmore (Via. Palani, Dindigul, Trichy & Vriddhachalam) with convenient timings.
After POY - PTJ GC, POY need a daytime train and/or ONT to MAS (Via. PTJ, ED, SA & JTJ). It can be new train(s) or extension(s) from CBE.