Ah, the last section. Not incredibly relevant to my post?
On the whole I don't really model an average of the polycule as a general thing. If dating someone I'm not currently would make me happier I talk to my partners about the possibility of a relationship. Thus far this has never gone in an either / or direction; it doing so would be a significant reduction in expected happiness.
Unrelatedly, that paragraph drove my autocorrect / suggester absolutely stupid. It kept trying to shove "def" into the last sentence, and suggesting other nonsense.