You sadly got one of the worst Case Processing Centres for economic applications. The problem is not your file - the problem is Etobicoke (Winnipeg is also the other hell hole).
As I like to say, officers like to "Eto-buy-coke" there.
The fact you have PAL and your MP indicates to me that a decision is looming on your file and I'm hopefully it happens by Christmas. Generally speaking, no ADRs (like paystubs etc.) are requested after PAL. Take that with a grain of salt though, they can ask you for this stuff at any time but it is rare after PAL.