If new stories were written by Westerners it would bring a new angle to the entire scene. Because our cultures are so different, our ideas flow from different sources. We only like eastern animation because we can understand their ideas. But must Westerners can't, so having the stories written by a different culture may appeal more to that culture. I think it would be interesting to have a large developer make a VN just to see how it plays out. Its straight up business, there is a niche in the market that isnt being filled, and there's no competitors. It would just be a gamble.
I would play a VN that didnt have the appeal of a Japanese VN. Definitely wouldn't enjoy western made VNs as the traditional ones, but i would gladly play them.
Also, I will be officially announcing my teams plan to make a VN by the end of July, and depending on how the story plays out, it might be done by the end of September