There's a Gwendy, whom you previously kind-of-romanced and advanced her quest. Before Adrian wasn't a consideration at all - you just fuck Gwendy and be done with it. After that update there'll be Adrian, and like it or not he is going to be the main partner of Gwendy. In CoC/TiTS usually you can complete the quest and walk away from stuff you don't like - futa, gay, pregnancy, rape, NTR, whatever, you just respectfully decline and back off while still finishing character's story in some satisfactory way. FoE isn't like that, though, there's different framing - hardcoded progression from vanilla to netori and you'll have to not progress the story to keep it vanilla.
People would be fine with this kind of update if it didn't force the story this specific direction. It's kind of like a false advertisement, you don't get the product you expected. Maybe I'm reading it wrong, though.