There's really no winning in this situation, but politically, I think this was the smartest move Marvel could have made. It's one thing to recognise the importance of creating roles for marginalised groups and the imbalance towards white actors, the history of whitewashing in cinema, etc; but there has to be some give and take if you're going to keep everyone happy. It's not as simple as saying "fuck white people who are pissed that we keep cutting white characters" when you're trying to push boundaries without sacrificing the good will of non-progressives, who just see racial recasting as charitable tokenism.
I think using this opportunity to give a white actor the role of a traditionally Asian character allows Marvel to say "look, it's not just about hitting a diversity quota; it's about thinking outside the box and finding the best people to interpret these stories for a modern audience without alienating the original fanbase. We're not just cutting out whites - look! Here's Tilda Swinton!" I think that's a very wise, conciliatory approach to the issue - even if in this case it was also largely motivated by anti-Tibet sentiment and Chinese money.
The Scar Jo Ghost in the Shell thing is much more clear cut, and is pretty shameful in 2016. That movie feels like just another cynical attempt to cash in on nostalgia and cult appeal, while mutating the property to pander to the widest possible audience.
