Thanks for your suggestion.
Reasons for Keepin it as Tenkasi to Kochuveli:
1. Thiruvananthapuram-Madurai via QLN, PUU is more again a distant route and since there are adequate trains like Guruvayur, TPJ intercity...
more... etc.
2. TVC region ppl will not prefer this route to Madurai beacuse its circutious.
3. There are already adequate connection between QLN to MDU and SCT/TSI to MDU.
4. Apart from this guruvayur punalur exp is already proposed for extn till madurai.
The Idea is to provide an intercity connection between TSI/SCT to TVC, which has patronage.