Last four of social is so abused it shouldn't count, and date of birth is in nearly every company's loyalty database. That leaves drivers license and state ID number as the leaked data. I'm honestly not sure how important or secure those are.
Exactly. Every leak already has it. Every company already has it. The fact that fraud is trivial is already true, and this leak really adds little to it.
OK, now would be so kind as to pretend that we've been leaked your birth year and state of birth?
Before you answer, you may want to poke your answers into this site and have a look at the outcome: https://www.ssn-check.org/lookup/
Caveat: This tracks your issue date, not truly your birthdate. In the past couple of decades many/most babies get registered at birth, but if I stick my own (birth) data in there I actually get the wrong answer, because when I was born issuance wasn't automatic yet. But that will work for a lot of people.
Both the first three and the middle two have a pretty clear rhyme and reason to them which would likely make getting them right a not-so-difficult task after a bit of homework.