I actually got a chance to see this last night, and I agree with the other posters who said that the Congo setting felt tacked on, at best- everything came off as generically "African" rather than of one specific country. While it doesn't seem that this is the only issue Pinkins had with the show, I can see why it would be a source of frustration with her.
As for all the drama surrounding this, it didn't show during the performance at all. And it's a shame Pinkins is leaving the show because she's pretty much the only worthwhile part of it. The cast tries, but a lot of the acting felt pretty stiff and wooden. In contrast, she has so much presence and played the role beautifully. Set and costumes are unremarkable, though the lighting is decent. Duncan Sheik's music is mostly lovely, but it feels out of place in this production. And the staging as a whole is pretty clunky.
I'd be curious to see who replaces Pinkins, because I think without her performance, the whole production would have been a total wash for me- not awful, but totally unremarkable.
I am a firm believer in serendipity- all the random pieces coming together in one wonderful moment, when suddenly you see what their purpose was all along.