Rob,
I totally support the anger dispayed, when the producers changed the Chinese Character to a European. I'm sure they could find someone who could fit the part, if not only for the authenticity, but to pay respect the brave soldier.
In the Aussie movie "Beneath Hill 60" that I've just posted a thread about, the producers used an aboriginal actor for one of the part, becuse one of the tunnelling team was that race. I'm sure if he'd been English, Irish or Scottish we would have that accent used, so why not the same racial origin.
Still, when the show comes on TV, I'll let you know about it,
John