Come on, from what I've read in the wiki Sanguis Astroism is one of the faiths that offers nothing for you to grab on to(no rituals, no concept of afterlife, barely anything comparable to gods, barely any concrete teachings, nothing on how we maybe came to be..you know, those important bits most religion tend to try to answer). Having been a part of it for a while all you did was scheme politics there. Sure, it's successful, but far from being a well rounded religion as far as actual teachings go(even Darkanism and Estianism have more to offer in that regard).
On the other hand, SA does offer something for you to look to when deciding how to act: actual stars which change from day to day.
SA does have pretty intense theological debates, but they tend to focus on extremely minor points. Part of the reason is that these are the points we can actually argue about and bring in-game arguments that make sense.
After all, if one character says "The gods have talked to me, and they said they have created the world in an epic battle three thousand years ago", then what can you say to argue? Unless the BM gods are actually OOC talking to you, there is nothing to grasp to. You can make up a whole mythos, but you just make it up yourself. A minimalist mythos allows things to develop by themselves.
