If this much circular is done , then i don't think there would be any time saving for any train.
The time taken for reversal at DD will be somehow equal (generally 10-15 minutes) or i would say lesser as compared to this going through DD and a bulb kind of railway system.
For compensating , DD stoppage, CR should develop other nearby any station like Uruli or Kedgaon, and provide Ample amount of MEMU/EMU between DD and PUNE.