Some 3 or 4 years ago in the UK there was an idea to subject each candidate to an oral examination on the subject with the Head of Training before admitting them to an exam. That was rumoured to become EASA-wide. However, with vast differences in how exam question banks are managed across EASA states, those ideas didn't see light back then. Whether it's going to happen now, when authorities will likely be less busy than usual with administering exams for some time - who knows...