This is his first game so I suppose it's not surprising to see amateur mistakes. The cut corners for content usually implies has had a reason for rushing the game out to sale but I don't know Japanese to ask. At the very least, he did a decent job with combat rape and corruption with an already strong main character to avoid most the grinding habits that kills boners. If he does a second game it should prove to be much better.
By the way, I wouldn't consider 'modding' the game without the developer's permission. Making a translation is usually the exception given the only thing that's done is interpreting the game in a different language which is always beneficial for popularity reasons, but adding content and rewriting the story can mislead people if people found it out of context or through searching, and that can hurt the creator. Not saying people wouldn't just realize it's fake stuff, but I have seen my fair share of neanderthals with money.
Also, you probably shouldn't double post, some people get triggered by that.