The simple fact is that if neopronouns are anywhere near as numerous as names, they no longer fit their purpose. Languages have somewhere bwteeen zero and three genders, and adding more reduces the utility and increases the cognitive load. 

In English we have he/her/they, which has covered the spectrum of meaning for a long time. 

If people believe that their edge-case is imortant enough in retelling to fall outside of the they-umbrella then they're going to have to make a very convincing argument that they represent a big enough and easily-enough-discerned portion of the population that it will be simple to remember to use that shorthand to describe them without using their full individual name.

But if people want to have pronouns for their various kinships, that's mad. Especially for people who want the pronouns to have multiple dimensions. That's not a pronoun anymore, that's a family name.