extending KCG CGL till NCJ for 4 days/Daily will be better rather sending Charminar, as already KCG CGL/PDY is half ruined and now ruining charminar exp will be worthless. Atleast Charminar/Sambar SF will be dedicated to chennai. Anyways KCG CGL/PDY is mostly being used by Tirupathi Travelers Rather chennai pax. this will create alternative for NCJ pax for TPTY also.
17653/54- operated as a triweekly with single rake by making it operated in alternative days with 1 hr late departure from both the ends via-TPTY,KPD,TNM,VM,PDY.
17651/52- can be operated as dedicated daily...
more... train with existing slot with existing route via-RU,AJJ,MS,VM,TPJ, MDU,TEN,NCJ.
17643/44 & 17655/56- 2 Dedicated Rakes with speedup and PM at COA will be better
Charminar extension will ruin the connectivity to chennai
as a frequent traveller to chennai from hyderabad with these trains its always a headache, booked tickets month before still tickets are In RAC.