1) The title of this topic says "translated," meaning that the VN in its original, Japanese form already existed, or if the VN hasn't been released yet, if it were, it'd be released in both languages.
2A) It should be obvious that English VN means it's all in English, just how you would assume that a Japanese VN has both Japanese voice and text, unless otherwise stated.
2B) The part about people with better Japanese than English might be understood from my response to question 1.
2C) I couldn't think of any reason to not read English VNs other than the reasons, but that's a good point, so I added another unbiased choice. And there have been a ton of people in this thread/my previous one/other forums/etc. that absolutely refuse to watch EngDub Anime, so I included it as an option. The bias, as you call it, isn't to lead someone into answering a certain way. It's not like I wrote "Yes, I will exclusively read English VNs because I hate anything that isn't 'murican." or "No, I refuse to because I'm an asshole, and here's why:..."