Just woke up. Caught up on the Dalish Elves news post, (wasn't that codex entry already in the games? Seems really familiar), and the Red Hart Halla and the Bog Unicorn. Both look pretty dumb if you ask me. The halla doesn't look cool and the unicorn has a bloody sword through it's head, (well that's what it looks like). I'll probably get the standard edition if the collector's is crap.
... So, I just realized something that should have been really obvious, but it only now occurred to me. 
If Cullen is indeed our military adviser - assuming that you can't swap out the character for a different one - he by definition has to be pretty middle-of-the-road in his views and willing to work with just about anyone. A companion can leave, or be dismissed, or just become so obnoxious you never use them because you have eight others to pick from, but if Cullen is the only option for a military adviser and the branches grant perks as described, losing him would potentially be pretty crippling to the gameplay. The devs would also presumably want to make sure a wide variety of Inquisitors would be able to interact with him without finding him insulting or annoying, since interacting with him would be less optional than interacting with any given companion (again, assuming Cullen can't be replaced with someone else if you don't get along with him.)
That's not to say he'll lose his personality, the writers are better than that, but given his role I think he would pretty much have to default toward less extreme opinions.
This is one of my biggest worries. Because if the Inquisititor is acting in direct oppostion to his beliefs, he can't really say anything or act. Or at least in the way that I would want him to in that situation. Hopefully towards the end, he can betray you if you are an absolute dick to him.