It would also make the interpretation of the law by courts even more inscrutable (AI doesn't think like humans) and by having a greater capability to process case law it would magnify the significance of case law, eclipsing the literal written meanings of laws. With AI aiding or making the judicial decisions they would also be determining that case law and thus would effectively become the legislature as well.

Judicial decision making requires an understanding of society, logic, abstract reasoning, human practicality, and number of other things such that being a good judge may well be a human-complete problem. Meaning that we wouldn't be able to have good AI judges until we have AGI, at which point we also have superhuman AI and we have a near-extinction event because any schizo can use AGI to blow up the planet.