This is a good change. It's also a needed one. Filing a DMCA is invoking a federal law with some potentially serious consequences. LL wants a real paper trail when somebody does so. It still doesn't address the issue that the one filing doesn't have to divulge contact information while refuting one does require that but that's a fault in the law, not LL's handling of it. Hopefully this will stop at least some spurious claims being made since at least LL will have the information to contact the filer if they needed to provide that to a court.