This train should be degraded to M/E category for the third class TT it's given in ET NZM ET section.
12779 has scheduled overtakes by 6 SFs and 1 Rajdhani just between GWL and NZM.
12780 has overtakes by 4 Rajdhanis, 2 Durontos, 1 Garib Rath, 3 SFs and 2 Humsafars between NZM and ET.
I don't think there is any SF...
more... train with worse priority then this one. It will be perfectly fine as a M/E train.
The most humiliation 12779 getting overtaken by Gondwana SF which had twice it's number of halts in ET NZM section.
Even after LHB conversion and 130kph upgraded no chances of speed up so better will be to degrade to M/E and stop cheating passengers into paying SF surcharge.