Teva is not saying that the patents aren't infringed because of ex-US manufacture, they're saying that they use a different process that doesn't use the patented processes (886 and 466) and thus don't infringe. In other words, their (partners) manufacturing process is different... which of course returns us to question #1: does their (partners) copy using their (partners) own manufacturing and measurment technologies meet the FDA criteria for approval. To date, the FDA's answer to that question has been no.
While there may be many roads to Rome, MNTA clearly feels that there's only one road to t-enox approval... and they just blew a bridge on the only road in.