Not sure if this has been mentioned in all of this....
Cast Call USA (who had posted the breakdown on that first link) is a seriously shady casting operation which charges actors for information that is--more often that not-- 1) dated/obsolete 2) roles already cast, frequently by big names 3) easily accessible for free from a variety of other sources.
...so I wouldn't place too much stock in them. That said, it's possible that it's legitimate. Wouldn't Larson's estate have some control over this?
See what a good audition can do? Change the race of a character!
Further proof that the race of the characters really has nothing to do with anything. Arguing about it is pretty damn shallow.
Now, I will say that I'd find it disappointing if the cast was mostly white. Racial diversity is part of the idea of Rent. (Whatever I think of that.) But changing around the races of the characters? Who cares? Their skin color isn't what makes them who they are. Oy.