I'd have to check with nanoff to see exactly how the variables work, but from what I remember from when we were designing it we did take this into account. It's still very possible to recruit P into the hotel even if you don't go for the "romance route". Particularly if you don't solve Argos' puzzles, but even if you do it should still be possible to get P because if their "scores" are too close you'll get to pick which one stays.
For now it may look like that the romance route is the best one but just wait. Particularly with Chapter 20 the familial route will have a lot going on, and I'm quite sure there'll be remarkable moments where that route will feel stronger than the romance one.
Whichever route you go, I'm trying to make the experience feel very right regardless.