I have had the following suggestions so far as to how to scale the impact of a given interaction. These are the suggestions I have so far:

2.5 times less powerful
10 times less powerful

The latter suggestion doesn't work because it will cause certain interactions to have an impact less than 1, and other interactions to have an impact of exactly 1. So, ten is too much as a flat reduction to apply.

There's also the option of a "power" slider, allowing between 10 times less to half as powerful to complement the frequency slider.

I've at least a week before I can return to programming the mod (unless there is a bug) so please suggest stuff. :)