As an outside (mere Pax) I understand that BA use such a system and have been doing so for many years?
It allows all of the monitoring that you suggest and occasionally the identifiaction of where some additional training might be useful. As Phonix said, it all depends. My guess is that the folks who run this will take a while to find the right balance. The only certainty is that it is being installed because someone thinks it will make/save money and improve reliability, service, etc. In the future, I expect that such systems will become standard.