1.From my observation, it is true that Canada goverment began more tougher background check to immigration appliciants since mid 2023. Similar as DS-5535 process.
2.Another thing is for their job security , tons of 66k DS5535 cases need 66000 working hours to clear (1 hour each case). An analyst working hours is ~2000 per year, so need ~33 staff at DOS to work one year , that is why they requested budget for it last year. Imaging if DS-5535 gone , where 35 positions gone ?