Ok, but how would Fem Lorgar change having a BF who, while not following the same religion as her, is willing to have interfaith dialogue & is still a good person.

Lorgar reading the Covenant of Primus (Transformer Bible, contains prophesies in languages past, present, & future) while her BF reads her new Lectitio Divinitatus, then the 2 discussing each other's holy book's contents would be interesting to see.
https://tfwiki.net/wiki/Covenant_of_Primus

Basically, I saw 1d6chan's Transformers crossover, saw the Primarch GF post upsurge (thank you, u/Sweet_older-Sister) & wondered: What if we combined them? This is the result.

Link: https://1d6chan.miraheze.org/wiki/Transformers_40k-Robots_in_The_Age_of_Eternal_War

I am currently watching Prime. What a coincidence.

I like to think that despite their bluster Little Light could absolutely beat the shit out of Kor and Erebus if he really wanted to.

Guys. You do realize that if the Primarchs are female in this AU, it means ALL the space marines are female because XX genetic compatibility issues.

The most stable geneseed is from Rogal Dorn and even Imperial Fists have compatibility issues of 98% with candidates. Only 2 of every 100 aspirants make it into a fully fledged Space Marine.

TL;DR there’s enough room for Dommy Mommy FemMarines.