A year back there was a proposal for rake sharing of Nethravathi & Matsyagandha which meant that the Nethravathji towards Mumnbai would have had to leave TVC early. As a result of its preponement, there was also a proposal to make Sabari exp leave early as compared to its current time so that PF is available in TVC. There was also a talk about making
Sabari leave from KCVL instead of TVC. The dep time was almost the same time as what you have suggested here. But I guess none of them have materialized till date. Nethravathi rake sharing with Matsyagandha is on cards. Maybe once that happens cascading effect might probably see Sabari leave TVC slightly earlier