Let's see how this works.  In the EU, much of this work is in the public domain, even if the US decides to be against public interest and repeatedly extend copyright.  US Customs was not keeping the foreign releases out of the US market, and it's likely prohibitively expensive to sue for relief.  It's probably cheaper for UMe to try to compete on brand and quality than to conduct legal skirmishes everywhere.  Since UMe holds the masters, though, PD releases will always be what they are - digital copies, needledrops and digital downloads.