This was ought to happen. Because even if both pairs don't have break-neck crowds, they manage quite a good patronage throughout the year.
For what I've seen in ETW, GS boardings are also in pretty decent numbers. And while NCR/PRYJ with it's usual attitude may not add extra halts to the regular train, I agree with you they should definitely try extra halts over NCR for the special.
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These districts have people working in Ludhiana, Jalandhar, etc, I don't think revenue will be much of an issue. And definitely, the ultimate solution is extension to SVDK and giving it a full length rake. But with Jammu Mail extension, I'm not so optimistic about that, unless Mahakumbh effect does some magic.