Will the review assess overall mortality of the vehicles compared to similar cars, and overall mortality while FSD is in use?
Fatalities per passenger mile driven is the only statistic that would matter. I actually doubt this figure differs much, either way, from the overall fleet of vehicles. This is because "inattentive driving" is _rarely_ the cause of fatalities on the road. The winner there is, and probably always will be, Alcohol.
Alcohol is at 13384 in 2021 [2].
Although you're right that alcohol does claim more lives, distracted driving is still highly dangerous and isn't all that rare.
[1] https://www.nhtsa.gov/risky-driving/distracted-driving
[2] https://www.nhtsa.gov/book/countermeasures-that-work/alcohol...