Now that I've had some time to genuflect on something people have apparently been whining about for a while, I feel like I can say this without questioning myself so harshly now. So.
Just wait and see. Who knows? Maybe we'll end up getting some kind of dual voice option in the future. There's a fair share of games that do it these days, so it isn't exactly impossible, and even if we don't get it out of the box, they may do it down the line instead. I'll admit I'm biased towards the original voice work, but that's because they all do such a spectacular job of capturing who they've been casted as.
Buuuuuuuuuut that's just my take on this whole thing. /shrug