It deserves because it is the only train to Tirupati from NZB/SC to TPTY which caters larger towns and cities with many halts ..
Many people will prefer this.
And this train earlier had less coaches and after LHB it has added more Coaches.
Other trains towards Tirupati from HYB/SC/KCG are 24 coaches like Narayanadri, Venkatadri.
So...
more... if they have got then their coach composition will be disturbed.
And this train has no RSA which makes it easier to get LHB