Have the Scottish law definition of witchcraft as crimen laesae maiestatis Dei supersede the Common Law definition of witchcraft as a crime against person or property earlier. English law was "soft on sorcery" because, like other "soft" traditrions, it continued to use a definition of witchcraft that regarded is as a criminal act against a person, like burglary or assault. Other legal systems (most notoriously the imperial criminal code, but also canon law, which was moderately safe to be tried under) viewed it as a crime of treason against God, and thus punishable by the highest penalty per se as well as socially corrosive in the highest degree.
Have people in the English-speaking world not only take witchcraft seriously, but have them think it is something contagious and subversive, like Socialism or abolitionism. That should ensure more vigour in the prosecution.