Zoey Raven always created good walkthrough, and he still does, I agree that he abandons them too soon, but also see it through the eyes of him doing it, most people are doing it in their free time.
If a walkthrough(PDF or MOD) takes too long because of the many things that got added like in this game, then I agree why he would abandon it, luckily there are alternatives.
However, more and more mod makers are stopping making a mod for this game, this includes the walkthrough mod too because a lot of things change which each update, we can only hope to see if maybe
Sancho1969 can create a mod since his other mods are top notch.