Aṣ̌a's role is not limited to judgement: In Bundahishn 26.35, Aṣ̌a prevents daevas from exacting too great a punishment to souls consigned to the House of Lies.
In addition to judging, Aṣ̌a's function includes preventing daevas from meting out too severe a punishment to souls in the House of Lies. According to Bundahishn 26.35, Aṣ̌a restrains daevas from imposing excessively harsh penalties on those souls.