I haven't had time to look at this in detail, but if we keep the provision that requires it to be based on complaints, it must be possible to complain anonymously. Often, people don't dare make complaints if they cannot do so anonymously, especially workers. I think it would be good for the commissioner to be able to investigate on her own initiative in places where it's more problematic.
Apart from that, do you have any other suggestions that you haven't had time to mention?