We're ostensibly the leader, but initially, I could see us being at least intended to be more of a figurehead. I mean, it's not like we're democratically elected or we earned the position, you know? We're probably being used for our special Fade hand. Heck, maybe that's why we have pillars to help us "run" the Inquisition. I mean, it's a pretty big jump to go from Cassandra considering you the only threat she sees to letting you lead the whole organization. So anyway, it's a conundrum I've been considering.
I would LOVE to see this.
But you know... I always sorta figured Cass for being the practical sort. That she believes in the Chantry and Maker, but when it comes down to it, she's about getting sh!t done. I was sort of intrigued by her being called 'the Believer' in those twitter reveals.
I think that we might be put at the head after we somehow demonstrate the ability to close the tears. I don't think Cassandra would have much problem with handing the power. She cares more about stopping threats then who is in charge, in my opinion.
As for the PC, I think we'll have full power on doing whatever we want (though Cass and the advisors will help in leading the Inquisition). I don't really care one way or another, but It'd be a huge marketing mistake to say all the times that we have full control, we lead the Inquisition (from the start, as they always said), etc. and then people Discover we're just a figurehead at first.
On the Cullen's label, I'd love the Fallen, for personal reason (I have for years years a story with a protagonist that he's a 'Fallen' that I should probably write Someday).