Agree.. There is a whole 1 hr gap between Kondaveedu/YPR KCG and Prasanthi Nilayam. And if the development which u said takes place i.e Kondaveedu daily, BZA DMM can be diverted to run via NDL-YA-HX-TPTY-PAK-DMM and can be extended to ATP if needed.
Most importantly, as the slot of GR has been changed in GY-YPR section (which used to have slot sharing with Kondaveedu), even if SWR disagrees for Kondaveedu daily, it can be made to run upto DMM in the remaining four days and the DMM BZA can be diverted in above said route.