This is included in these sort of previous rumors about Saxo changing things around. I was attentive during the days when the 0.04/0.05 updates were released and Giest was introduced, and although there was some skepticism expressed on Patreon, the harsh critique of "omg NTR" was exclusive to this site. And to that argument, it was already refuted in the post you responded to.
I'm not putting aside the criticism against Geist, though. I know people were unhappy with his aggressiveness and the conflict that arose between him and the couple. But to blame the turn of the arc on that people protested the "borderline NTR" nonsense is just false. None of that can be found among the comments of the Patreon posts at that time, and I challenge anyone to come forward with a screenshot of Saxonado bringing that specific cause up for the changes made at that time. Until then, it's just rumors exclusive to this site...