Hello
I just received my citizenship certificate on Sep 23rd. My timeline is in my signature. A piece of advise, you can indeed book an appointment for the passports before receiving the certificates (you don't need the certificates to do the booking). If you chose the option that you don't have a date to travel, the system will give you an available day just after 45 business days. Its not a matter of how busy they are, they send everybody to wait 45 business days (9 weeks). I was waiting for the certificates to do the booking, and now my appointment is at end of November.
Anyways, my trip with IRCC is done.
Good luck everybody and thank you for all your support.