If it goes back to the old days when it used to depart at night (18189) and with slight speed up it will be great ( dep around 22:30hrs). Reaching ERS around 8pm/9pm.

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With frequency increase, the 24 hr turnaround will no longer be there. It will mostly be PF turnaround. Train 18189 will arrive at ERS around 1:45am & return journey 18190 will start at 7:15am if you look at the new days of operations. Maybe around 5-6 hrs time available. If 18189 gets delayed, then 18190 will also have a delayed start.

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Yes, TT of 13352 can be changed totally. The TAT at DHN will be decreased.
The new TT may be like
/train/217243

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How come it start with PF attention when one way distance is 2300km and round-trip I'd 4600km when PM cycle is max 4000km for LHB rake? It has to go pitline for SM 5-6 hrs and another 2 hrs on PF placement and Shunting another 2 hours buffer to absorb late. If same rake has to return then dep from ERS will be changed to afternoon and new TT wil be given for saving a rake.

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Till the time the ERS-Allp-KYJ section is not doubled highly unlilkey chances of more trains in this section. It is single line from ERS-KYJ and few patches of doubling. Also while the TT is good, it is peak hrs at TVC/KCVL so that also is a big challenge. Maybe in future once doubling is done and capacity is enhanced there is a chance. As of now many trains like Ajmer-Ernakulam, Pune-Ernakulam are waiting for extensions till TVC but are getting rejected for the same reason

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