I doubt that they see this as a "problem" that needs a "solution". The decision could be based on their opinion of what the laws state.
I wonder what happens if you export a Library.xml file and then try to import it after moving.
Law has nothing to do with it. Every single other music streaming service handles this situation with literally only one click which changes the country.
If content is not licensed for the new region, then it shows it as unavailable but a no point data is lost.
I have to agree with this, it is your sole discretion if you want to switch your Country on your profile.Maybe a dumb question, but why do you need to change the country? I lived abroad for nearly two years and still kept my account on US. I never had a reason to change it. The only thing that comes to mind would be maybe some apps that aren't available...? But you can even get the TfL app from the US store even though you need to have a UK address on your account.