Personally I feel most settings are enriched by including a wider variety of religious experiences instead of all pseudopaganism. It's a seminal and profound part of human history and I like using Exalted to have feels about human affairs, so I really enjoy this presence in Fajad. Especially that the spirits are also believers!

All that said I do think this is something worth talking to groups about before presenting them with, along with several other Exalted setting elements that cut against our assumptions of safe fantasy worlds - like slavery, or an empire that is neither whitewashed...