I was taught to judge appraoched by aspect only at PPL, but at CPL level was taught to nail the PAPIs when available.
Even three whites going uncorrected for any appreciable length of time got a comment from the instructor.
From comments above it looks like this is also being taught to commercial students at Oxford.
Maybe it's just the instructors, or maybe it's because CAAFU examiners are expecting to see the PAPIs nailed during the CPL skills test?