It has a very anglican focus, so something that goes into more depth on the non Russian/German/US/Britain/Japan elements of WWII would be helpful. But what else?
Sort of a bonus question, but what are the major shortcomings of the documentary? What did it miss or get wrong?
Even when the documentary series was British-centric, it missed a very crucial part; the breaking of the Enigma code. It was only disclosed a year after the series was released. Had it been made public before the production of the series, it would have most likely earned an episode dedicated to just that.