It's intended for Japanese audience, and it probably helps Japanese actors get experience and more exposition (not to mention more money in the bank). Japanese people have different taste than you. Hell, not even just Japanese people, as Bleach musical is loved by many.@Viper
Theater acting is not that different from mocapping. Many mocap actors do the comparison when asked what the mocap experience is like. So I wouldn't say it's impossible. IF it wasn't a damn musical, which I wasn't aware of.
So to the fact that they should have chosen westerners, I should add that it shouldn't have been a musical.
*pats him on the back* You'll just have to suck it up and stick to games, anime, and artbooks.