More globally, it develop consistently whatever Kane's K rank.
I'm less affirmative on this.
The background story is consistent, but there's already clear nuance that appear between a Kane that will reach the top, and a Kane that will perhaps never be something else than K ranked.
I have 9 playthrough, with Kane as K9, K7 and K4. While the story is consistent, but it's not equal in all routes. None of the top characters make a real difference between K9 and K7, but some clearly express their disappointment to see him only be K4.
They aren't surprised that he perform really well (K9), he will be a good leader, whatever they mean by this; it does not imply that he'll lead the Karlsson group, being ranked Z4, or even just M would already made him an exception. But at the opposite, him performing averagely (K4) force them to expect that he'll find the right mistress, one that would be open to his possible advice; him being submissive does not imply that he's stupid.
There's also the personal relation with the four sisters (for both Kane and Olivia), that will probably have an influence on who will have the most influence on the board. Without forgetting Elena own little project, that make the relation between Kane and Olivia also being an important factor.
While we don't really know about Alessandra's view of the future, and perhaps not about Juliette's one (I don't know, I avoid her as much as possible), we still clearly know that there's at least between five and eight plans in progress:
- The original Gambit made by Alexander, we know nothing about it;
- Dominic's Renew project, to which Veronica collaborate;
- Dominic's Cole project, that is linked to the Renew project, but possibly something different since Dominic never shared it with Veronica;
- Veronica's own project, that goes at the exact opposite of the Renew project;
- Elena's Princess Eyes project, that would at least interfere with Dominic and Veronica plans, at most cancel them;
- The Gambit Queen's plan, we just know that it's to interfere with Alexander's Gambit;
- If she isn't the Gambit Queen, then should be added Callista own plan;
- If Callista isn't the Gambit Queen and if it's not her plan, there's also the Quiet revolution.
All this lead to an uncertainty regarding the end of the story. With the five firsts plans, the Karlsson group will survive. With the two following, we don't know, but with the last one, the Karlsson group would disappear.
Now, perhaps that the outcome is frozen, that all the projects but one will fail independantly of Olivia and Kane actions. But if it happen that it's the case, then I'll be really disappointed at the end of the story, because our choices as player would have then be limited to present us a different way to reach an immutable destiny.