Nothing wrong with Pagid pads, they are decent and more than adequate for the average vehicle. I probably wouldn't fit them to high performance vehicles unless it was their racing range, but then other brands would come before them.
As above check the brake hoses next. What is the condition of the pads? Not the amount of meat they have left, are they shiny/cracked?
You say you've done 50k miles, but the pads have done nowhere near that mileage. It's the age of them that will be affecting them the most.