Modding Familiar Assignment

So, one of the new externalizations in 1.2 is FAMILIAR.2da, which appears to control the assignment of familiars by alignment. However, exporting said 2da via Near Infinity and editing it does not appear to have any effect on the game. Is there a simple way to change familiar assignment that I'm missing, or does this require nitty-gritty modding?

EDIT: Updating with confirmed working and not working.

Works:
[spoiler]Lawful Good: Ferret
Neutral Good: Rabbit, Dust Mephit
True Neutral: Pseudo Dragon
Chaotic Neutral: Fairy Dragon[/spoiler]

Doesn't work:
[spoiler]Neutral Good: Fairy Dragon, Cat, Ferret, Imp, Quasit
Chaotic Good: Ferret[/spoiler]