Religion really had nothing to do with Taylin's decision to leave OW. (And she couldn't care less about Sartan or Adgharhinism.) Thing is, she's hated OW for years, and has tried several times to get it killed off. It almost worked with the Arcachon/Aenilia war. This seemed like another good way to try.
Ahh, that surprises me. I'd have put money on it being a "sod this religion crap, I'm outta here" kinda thing.
If she hated OW so much, why not secede and form her own realm? I'm sure Arcachon would have offered support. Or you could just lie, that usually works, "Selene is evil, her Council is full of stooges" would have been an easy one to pull off.
Anyway, she's in Toupellon now. Do you think she'll stay?
