And for your info KCG-MAQ trains is not only for MAQ pass...
It is SCR train and this is the only train giving KCG/KRNT/HX-SA/CBE/SRR/CLT/CAN/MAQ. which is more useful for AP state/telugu people.
If KCG-MAQ is via UBL/MAO/MAQ then it just gives connection to KCG and benfits people of KCG,UBL,MAQ and MAQ why should SCR think of only KCG?