Good people don't rule countries - countries are not "good" entities, they are functional entities. Any notion that a leader, or a nation and it's body politic, are good and noble is blind patriotism and I have as much time for subjugating myself to a make believe set of rules under a make believe body of power as I do a religion.
I would never look for a good person to rule a nation - so, whether or not Celene and Gaspard are both horrible people - is not something I would readily consider.
At first, I was against Gaspard because he spoke to my past and a person I was that I'd like better to avoid. Celene, however, revels in "The Game" and her capacity for duplicity is all encompassing.
However - the man Gaspard is, is forthright in its cruelty and desire for power and control. I can respect a person who comes at me head on - even when he's tricked me into a trap. It was clear to Celene that Gaspard was jockying for power - that she was outwitted does not make his actions duplicitous. If I say: "I am going to take from you." The manner in which I do so is not duplicitous based on the fact that I did not tell you "How" I was going to take from you.
Celene, however turns not only on her Champion in, what I believe, is the worst decision of her career - but also on her lover. Two people who supported her and two people whom she did not even have the courtesy to inform: "I will use you as currency and when you are spent I will discard you."
ALL this is coupled with the fact that Gaspard knows his weaknesses. I admire a man who's aware of his shortcomings. And he compensates for them. Apostates, Dalish, Nobles - if he's got a need, he'll admit it, and fill the space with competent professionals.
Celene seems to rely completely on Briala a Michel to the point where not a single thing (except for the greatest debacle in the book) is her decision. By the end - she betrays her two greatest allies (and assets). She is an utterly incompetent ruler who chose the path of deception to enforce her ruling (vs. the path of diplomacy or force or commerce or any number of other means of control).
Celene's nature seems, at first, appealing because boy would she just love everything to be sunshine and roses for everyone. But it isn't and when it doesn't work out that elves can just be free... and education can just be for everyone... she resorts to the worst possible forms of coercion.
At the end of the book I was still supporting Celene - though with a sour taste in my mouth - but the boards and some of it's members have absolutely convinced me to side with Gaspard.
Let's see what Inquisition shows my Inquisitor and how I'll decide then.