Case Law is in-transparent and tough to navigate through vs. Civil Law Code (Roman Law) from Continental Europe, where law has to be derived from higher written

Case Law is in-transparent and tough to navigate through vs. Civil Law Code (Roman Law) from Continental Europe, where law has to be derived from higher written-down principles. It's mostly the Anglo-Saxon societies that have Case Law. My intuition is that legal costs are higher in Anglo-Saxon countries, which is the direct result of the Case Law system. China and Japan adapted Civil Law (Roman Law) as their system, which they then customized internally. They compared different legal systems and concluded Civil Law to be efficient.