Localization of this game is impossible. If it had any sort of gameplay like Corpse Party, DanganRonpa, Zero Escape, then it would have a chance but a pure visual novel is just impossible to release in USA.
As we all know, MangaGamer is releasing a new translation with updated art of their own. They confirmed it that it would be on a new engine and not on BGI, which was used for the previous release. If this new engine is easily patchable I am considering to make a voice patch for it. I cannot say anything before I see how the engine works though. (If someone doesn't know, I am Levani from Umitweak, so I have experience with inserting voices to visual novels) The ideal thing for me would be if they released it on Onscripter, just like Umineko. If it was on Onscripter, it would have already gotten a voice patch by someone else and wouldn't need my involvement but the world is not that kind.