I can understand your sentiments and affection to this train.
But kindly open your eyes and ponder logically. Telengana exp may be a historical train , legend train but it's just a simple SUPERFAST category train and In indian railways , Super fast category trains get lesser priority as compared to Rajdhani class.
Mumbai Rajdhani in all its SANE NORMAL runs can overtake ANY train ahead of it, be it Telangana or Tamilnadu or Karnataka or Shaan e Bhopal.