I know it's been almost three weeks but I just thought of something.
While the Hinterlands chapter - and by extension, P and Storm - is still fresh in everyone's minds and there's a minimum amount of implemented content you guys would have to rework, why not reach out to the fanbase on the matter? Like what you guys did with getting the fans' ideas and such regarding Asterion r18 content, it even just a poll on Twitter?
I understand that you guys probably just want to move on with the project by this point, but if bringing this up to you guys was enough that you'd actively keep it in mind for the rest of the project, as you said, shouldn't it be important enough to see what the fanbase thinks about it, too?
You guys have put a lot of time and effort into the Hinterlands already, I get it. But all the same, there's bound to be people who are strictly opposed to P and Storm being romantic or are only interested in them being familial; such players are then forced to completely pass-up on a not-insignificant about of content from the Hinterlands in the form of P and Storm hanging out together. Likewise, assuming that "course correcting" means anything like "giving the player a choice later for P to take back what he says to Storm in Chapter 18" if P and Storm end up romantic, such a scene would likely come across as needlessly cruel to Storm regardless of how it was written.
Getting an idea of what the fans would want might be a good idea here. But at the end of the day, it'd be your choice as the devs. I'm not saying that this has to or even necessarily should be what you guys do, just that it wouldn't hurt to consider doing it while it's not unreasonably difficult to handle...
Again, it's your choice, though. Just wanted to bring this up.