I'd say that has already been achieved. SA was bloated by so many people who didn't care about SA, that it was made hollow and teethless.
The realms that band together now do so for political reasons, not religious ones. Point in case, Morek just signed a ceasefire with Asylon.
SA is already practically everywhere, that there's no point in trying to spread it further. The more an organization grows big, the costlier it ends up being trying to expand it further. SA has reached that point. There's nothing left to federate SA against anymore. Not with all of the loose elements within that would not care to bring it back together.
