Mystranna Kelteel wrote...
He was "loyal" to the point of starting a civil war, poisoning his peers because they might have disagreed with his treason, murdering and torturing the children of his other peers, and selling the kingdom's own citizens into slavery.
The poisoning bit I agree on, especially since it might have been put into motion before the battle. This was done though to try and avoid a civil war, not start one. It failed, other lords did start a civil war as a result of his coup.
The torturing and murdering children of his peers he might not have been aware of. But then, desperate times, the blight was growing. And this isn't exactly something unique to him. The player, along the way, has the potential to kill, main, blackmail, manipulate, allow people to be possessed, spare a mage who experimented on your fellow wardens, all in the name of the greater good. Not to mention sparing murderers just so you can use them. And even if you went the goodie goodie route, odds are that you killed human soldiers that you could have bypassed, human soldiers you could have used to fight in the final battle, just because you were being thorough in killing everything on the map, getting every bit of xp and loot in the place.
And the rational for selling the elves was that, without the army, they'd all die anyway. Yeah, not nice, but then, guess what, humans, especially human nobles, frequently aren't nice to elves. They weren't in the past, they weren't in the present, nor will they be in the future. In his eyes, it was their death and the death of countless others or their slavery. He took the lesser of two evils. And this was in part necessary because others revolved against his regency.
In short, what I'm asking is, was he really loyal to Ferelden? You might be able to argue that he was loyal to the concept of the kingdom, but he certainly was not loyal to the kingdom's people, laws, or government. When his "jury" of peers sides against him, the first thing he does is call them all traitors. He's only serving himself and his own fears all the way to the end. If you call that loyal, well, I don't know what to tell you. 
Ever lost the landsmeet? Your own side right away starts swinging as well. No duel option there, if I remember correctly. And the guy giving the order? The father of a mage who dealt with a demon. The husband of a wife who protected said demon and whose attempt to circumvent the laws regarding mages set up the situation that allowed the demon to possess the mage to begin with. None of whom will be punished. They are on the side that wins, after all.
But, yes, Loghain is loyal to his view. His morality has gotten eroded, as he takes one step into darkness after another to back up what he's already decided. That's why he had to be broken, to lose it all, to see even his daughter reject him, before he can regain clarity. He had to hit bottom.
I'm not saying I like Logain. Think the game made him a bit more evil than they should have. But he is a driven man, one who holds true, and the best general in the land. Once you defeat him in the Landsmeet, you can use him.
And my character, in the warden tradition, used him.