Saw this last night at an advance screening. Taken on its own, its an above-average PG-13 action flick with fantastic visuals and an incredibly cool main character. As an adaptation of the source material, I feel a little similarly about it as I do the recent Beauty and the Beast. It manages to pull off the big, big moments from the original well, it adds a few interesting wrinkles of its own, but ultimately loses a lot of the elegance that made the original so special. The ending is also sorta butchered.
The race thing is... interesting, though as a pasty white dude I'm probably not the best person to speak to that issue. It did strike me that the film seemingly has a lot more to say about the nature of its production, in almost a metatextual way, than I expected. It makes an interesting attempt to try to talk about issues of identity and cultural erasure In homogenous societies, moreso than the original. Now, does this make the central casting an interesting meta step that fits with these themes, does it represent the writing team trying to make the most out of some problematic casting, or does it make it a deeply hypocritical film? That's the question I'm still wrestling with.