A "little less" quality? A much more less quality. The "problem" with Stoper is that he's really good, and his quality is top level, otherwise everyone would have abandoned this thread due to the bad management of updates, bad communication and constant delays. If it wasn't for the top quality, nobody would care about JOHN, there are so many VN to play. This one stands our for one thing: quality in the rendering details. The eroticism is also excellent, but alone does not make it stand out. That image quality is made by skills and expensive software (not DAZ that's free), that a hobbyst usually cannot afford nor proficiently use. A fan can make a similar themed VN, but the result would not be any close. The story would go in different paths from Stoper's, in ways that he cannot predict, because this is not the usual "boy wants to bang his mother" VN that has a predefined storyline.
So what's the request, ask for someone to recreate a Jessica characters and then invent a story. Well, in that case the fan-developer could just create a different story to begin with. In the end, we'll still would not have our appreciated JOHN, but a different product. It really makes no sense to hope for someone else to continue this story. The only hope for a fan of JOHN is that Stoper becomes more efficient and produces more content in a shorter time. There is no other way.