Aureus said:
People generally get annoyed with the attempt to justify FSMs within cannon, not with people who say "Screw it, I'm just gonna hand wave an FSM into the game for the sake of a good time."
This is ultimately what my group agreed to for simplicity's sake. We just didn't want to bother with dealing with rules conversions and a myriad of possible imbalances. It's not canon, but we're playing this game to have fun. I'd rather have my group laughing and carrying on about how they took down that Ork Warboss rather than them bickering about whether Faith powers are unbalancing the game or one player being too weak compared to the others. No one in my group is bothered by me hand waving it. I'm sure that there are some who would be, but whatever. It works for us.