So, now that's he's not Knight-Captain and not even a templar, what are everyone's thoughts on his new title? Do you think he could be "the General" we've seen talk of?
I think it's possible he's the general we've heard about. I'm excited to see how he's adjusting to not being a templar anymore. Well he isn't by title anyway but he was trained to fight the way a templar fights and was made reliant on lyrium so in every sense of the word, I think he's still a templar the way a mentat is a mentat. Regardless of what he affiliates himself with now, his abilities are templar abilities and his experience is from a templar role. It'll be intriguing to see him adapting this to the situation in DA:I. I just wish we knew if there was a cure for lyrium dependence. Maybe the Chantry had one all along and Cass reluctantly coughed up that knowledge to free him from a substance she couldn't guarantee procurement of. Having a founding member of the Inquisition reliant on something you can't supply and thus risking that member going mad, is a weakness the Inquisition can't afford. If Cullen were freed of lyrium and using more generic battle knowledge, then I'd consider him being truly no longer a templar. Since I don't know if that's the case, I'm interested in learning what he actually is this time. If he's more or less still a templar in all but title, I think him being an advisor makes sense and it'll be interesting to see him adapting he expertise to events. If he's been... remade, as it were, it would be interesting to see how he's dealing with the removal of so much that defines him and having it replaced with something else. His experience would still be valuable, of course, but would he feel differently about things if, in order to survive, he had to change how he fights and get rid of lyrium? A part of me wonders if there isn't a small amount of resentment at magic for "shackling" him to a magical mineral and using spirit based abilities. I mean the physical and spiritual sensations have gotta be weird and tiring, I think, to draw out mana and smite people. A straight up fight might be preferable.
It fascinates me to think of how he would handle the change from templar to just warrior. I somehow doubt this will even be a concern in DA:I though. Why unnecessarily hamper the Inquisition? There will probably be plenty of lyrium for Cullen to consume. It's just the whole "consequences for using lyrium" the devs mentioned that got me thinking about how Cullen could be an advisor and functional if they use this mechanic unless they A) Make Cullen immune B ) Make it possible for the Inquisitor to find enough lyrium and it's a Thing for us to worry about or C) Cullen has been changed to make it no longer an issue for him.
All of these possibilities provoke still more questions and I can't imagine Cullen would go through any of this without having some thoughts on the matter. It seems he already has had a change in his core ideals. He believes in what his templar duty was supposed to be but if that were all he believed in, I doubt he'd join the inquisition. He seems to have expanded his internal duty from just protecting mages and people from bad magic to being a protector of all. Fighting back demons spilling from the Fade breach is an extension of his templar duties but it's so much bigger in scope and it may require he learn to combat in a different way. That would surely have an effect on his thoughts about the problems that led to it. I'm anxious to learn them but I'm worried which way he'll go. Will he continue to fight for peace and balance and become an agent of change? Or will he see these changes he must adopt as misfortunes to loathe and chooses a side to blame? That's what I want to know. 
Apologies for the long post. I kind of got swept away by my own wonderings. 