My view lies solely with Lena's interaction with Seymour. EK has Lena alluding to the interactions as being of a "dark" nature coupled with her response of Dubai when Seymour asks her for her preferred travel destination. While Lena needs to be of a certain posh level (I think >3?) to choose this, it is significant that it results an "evil" (by the URM revealed code) expression by Seymour. (In addition to being a posh destination, Dubai is also a hotbed of sexual slavery.) Also, soon after I initially expressed this view on this forum, someone mentioned that EK was disappointed that in a poll, her subscribers did not express a liking for Seymour.
I do not believe this initial trip will be one of fireworks...first I think there will be an interlude in which Seymour gives Agnes control over Lena (can also be hot if Axel is involved) who will not have Seymour's sympathetic* nature and eventually things will intensify. As I have mentioned in previous posts, I expect the last few chapters of ORS to be in Arabic, so you might want to start brushing up now.
You said: "The only way I can see the dev even getting close to what you want is in a possible ending."
My response: yes of course....this will be a drawn out affair...I call it the LSD arc (Lena-Seymour-Dubai).
*(I initially received much flak by heavily anti Seymour people here. But my main plays have Lena embracing the sex doll role willingly so that my scenarios don't get sullied by the blackmail aspect explicitly which I think detracts from the eroticism. More erotic is for Lena to be forced into the role by her own inner sexual desires to be exhibited and manipulated.)