Maybe Paizo could consider doing something like "Variant Dedications" so you could allow membership to groups that have a character concept already provided by another archetype.
Like Firebrand Masked Hero Dedication - Allows you get Vigilante feats while providing slight different starting benefits
It always bother me when an class/archetype implies a organization that doesn´t actually exists in Golarion and we are throw into a limbo of things that don´t exists and a Golarion organization that should provides that context but don´t actually.
Like how the Cavalier worked in 1E with a lot of orders that didn´t exist but there were the Hellknights, Knights of Last Wall and etc that weren´t none of it