She did admitted that she writes story as she goes. But what you're saying is if true than that makes sense that she would resolve these inconsistencies. And it is not bad that she does this as game is still in development. But she still touches other routes as well as you see if Lena is couple with Ian, she will not join gym threesome now(Finally less Lena's hypocrite attitude). Also I'm not doing LenaxHolly playthrough as of now so don't know what inconsistencies were in that route. Can you tell me which were those inconsistencies?
It's the gardener vs. architect approach to writting. Eva Kiss appears to be a gardener, there is an idea she wants to strive towards, so she plants the seed and lets it grow organically each step of the way. It eventually gets to where she wants it, but because it is organic it might look different than the original conception of the idea, and how it got to the end could involve a lot of unexpected hiccups that need ironed out. Which is what ffive alluded too that it was an incosistency that Eva went back and fixed.
Architects on the other hand are more like Dr. Pink Cake. Same idea for the end, but planned out in advance every step of the way. Some deviations in the plan may occur, based on necessity, but the plan is going to largely be followed.
Neither writing style is inherently better or worse than the other, both can result in amazing works. Just a different style on how to get to a desination.