My take on this would be that, while those drawn to Yinkin, and other
Storm Tribe cults, must have shown some affinity for that path in
their behaviour, they do not need to possess all the god's
charecteristics. But IMO individuality pushes through, it is after
all what the disciple strives against, his own individuality, that
prevents him from being his god. As such, IMHO, that the greater the
commitment to the god, the greater the worshipper tries to suppress
their individuality in favor of behaving like the god did. So whilst
some Yinkini might behave 'like a cat' others may have an attitude
towards life that is cat-like and still others might idolize
the 'life-of-the-cat' as expressed by Yinkin but not necessarily live
it out apart from at sacred ceremonies where the worshipper permits
their cathood the chance to emerge.
This debate usually rears its head in the form of Humakti, and I
believe that the same comment applies - Humakt provides a system of
belief each individual engages with that in their own way and to
their own capacity for religious experience.
That said if somebody has fun playing somebody who tries to live as
Yinkin, they should, there is much room for them as for the person
who is only an alynx in holy ceremonies.