1) Every application is handled different. If you provided on Schedule A where you've been since the age of 18 till the time you sent out your application, most likely you won't be asked to update it.
2) If you sent your 6 photos upfront with your application, you won't be asked for additional photos upon PGR request, other than the 2 for the Police clearance they need to keep in their records before issuing the police clearance. The 2 additional photos are asked with PPR or COPR request.
3) If you paid your RPRF upfront, you won't be asked for it with PGR request.
Some applications go faster at the beginning than others then slow down as other documents are requested....