I'm talking with my players about opening up the Free Archetype. It seems clear that everyone should have access to either Arcane or Primal casting, but past that I don't see why it should be so restrictive.
Here's the two options we're looking at:
1. If you have Arcane or Primal casting from your base class, take whatever you want for your FA. Otherwise you must take a FA which grants Arcane or Primal (Druid, Sorc, Witch, Wizard)
2. You must have access to an Arcane or Primal Cantrip by Level 2, and I don't care where it's from (innate Ancestry, base class, feat, or FA). Take whatever you want for FA.
We've been playing together for a long time, so I'm not worried about power-creep. Can anyone see any problems with this? Is there some special thing about Druid and Wizard Archetypes that I'm missing?