Technically you can get a passport in 2 days if you have proof of travel and if you are ready to stand in line from 5 am in the morning atleast here in the GTA. I don’t plan to travel soon so I have no real need to get the passport in a hurry.
There is a 3 month grace period for you to surrender you’re passport and relinquish you’re citizenship. As another poster has said above, you can surrender even later. They will probably give you fine. The issue is that you cannot apply for OCI or even a simple visit visa to enter india to see you’re family without you surrendering you’re indian passport/citizenship.
With regard to flying to india with an indian passport, the issue is getting back to Canada. They ask you to cut the PR card and they make you do it in front of them and show them the pieces on camera during the oath ceremony. As per Canada, you aren’t a PR anymore and hence you shouldn’t be having a PR card. So cutting up the card is an essential part of the process and is done during the oath ceremony.
You cannot use one passport to go to india and another passport to come back Canada. You will be flagged in the system and that could complicate things further at the airport.
