My Warden city elf hated everything about the alienage and was happy to be leaving. He didn't consider the slavery plot to be any worse than all the other sh*t the alienage elves put up with on a daily basis. He didn't wish for bad things to happen to people, but he did kind of expect it. He didn't consider himself to have any particular expertise on human politics, but had heard stories that Loghain used to be some kind of hero who seemed to want to help his people, but had made some grave errors. Loghain didn't seem that much worse than all the other humans, and he would have spared Loghain if Alistair hadn't protested.
One might argue that this warden sounds like an a**hole, and I wouldn't argue with that. All that I disagree with is the implication that it is inconceivable that a City Elf would spare Loghain.
First bolded: Hah, mine did. The slavery thing felt like a real punch in the gut because, the way she sees it, her people have put up with horrific abuse for centuries, partly because revolting results in purges (read: legal massacres), partly because they console themselves with "At least we're no longer slaves." Loghain took even that away from them.
Not to mention Loghain rationalizes most of his crimes with the excuse that he is just trying to ensure Ferelden's independence. As far as my city elf is concerned, the second you start selling your own people into slavery (and worse, fail to acknowledge the double-standard), the whole "I'm just trying to ensure freedom" excuse flies out the window.
Second bolded: Well, yeah. If you choose to play a city elf like that (though I couldn't do it because just the thought makes my stomach sick), it could be conceivable. (That, and probably a bleeding heart who's willing to forgive anything, and... I guess... feel callous enough not to care that Alistair lost the only family he had to Loghain...? Hm...)
I feel like there might have been more he could have done, even if it was only to ask questions of the Kendells in the Landsmeet. But when it comes down to it, I suspect the main factor in my characters' not having been able to spare him to date might boil down simply to revenge. "He signed the slaver document, maybe Howe was behind it/maybe not, but I killed Howe before I ever knew about this and it was Loghain's seal anyway, so Loghain has to be held accountable. And I can't risk that he might survive the Joining." That's how I've played my elven Wardens to date, anyway.
That's very honest of you. My CE also wanted revenge, but if you asked her she would have said it was also about principle and setting an example.
My city elf saw Loghain as a responsibility-ducking hypocrite. Every time you confront him about his crimes at the Landsmeet, his response basically boils down to, "It wasn't my fault! It was your fault! It was his fault! It was Cailan's fault! It was the Grey Wardens' fault! If you/he/they hadn't done this, I wouldn't have had to do that!" And my city elf's just sitting there like, "Take some goddamn responsibility for your decisions and actions. Don't you dare pin this on me! Or Alistair! Or the Wardens! We didn't ask you to do any of this, so don't blame it on us!" And, of course, the hypocrite part comes where he's unwilling to even risk human freedom by accepting help from their previous oppressors, but is fine to sell elves into full-on slavery to their historical oppressors. Any sympathy for his motivation flew out the window then.
Revenge is part of my character's motivation too, though another part is PR; making him an example. City Elves have lived in horrific conditions for centuries because humans (especially nobles) know they can abuse them without consequence (Vaughan Kendell), while there are consequences for elves hurting humans. My character wanted to use her new-found power as a Grey Warden and Hero of the Blight not just to help her people move up in the world, but to show human nobles there are consequences for trying to push them down. "No, this is what happens when you mess with the alienage. Think twice before you try this in the future." She didn't want to let Loghain try the Joining because, like your Warden: "What if he survives? Now it'll seem like a reward/redemption instead of true condemnation." Even if he didn't survive the Joining, it's still a prestigious order with a chance at survival, so sending him to the Joining doesn't send the same message as a sword to the face.