A paleo-Hebrew Leviticus is interesting archaeologically, but the script says nothing about whether the words were copied accurately.

The script matters for a different reason: paleo-Hebrew was a deliberately archaic choice reserved for texts regarded as especially sacred, which shows the care the community took with the Torah. On accuracy, 11QpaleoLev is a substantial scroll whose text is close to the Masoretic tradition with some Samaritan-type readings, which is exactly the kind of witness that lets scholars check both traditions against a third.