Since we don't know the reason behind the sudden emergency maintenance, perhaps we should hold off for now. For all we know, RMTs created some sort of keystroke logger or something or implemented a way to steal your account. Or maybe, SE fired some dude and he broke a server with a hammer on the way out. Or maybe, it's just SE's failure to properly implement previous patch? We don't know. it's all speculation. whatever it is, though, it warranted immediate action.
regardless, a little transparency (at least post maint) would be nice.