I think the important part here is to view it from a proper "historical RP" perspective.
When I did the landsmeet the first time, my initial instinct was to accept Loghain's surrender, and get him to join the Grey Wardens, and I was surprised by Alistair's reaction (since Alistair is basically The Good Guy). Using my modern morals, I was more into accepting him and looking for his redemption, and thought everyone would be allright with that (especailly since he might die in the joining anyway).
However, let's think about what Loghain did:
- Multiple counts of Treason (abandoning the field, disobeying his king, basically leaving him to die) against his King.
- Caused the slaughter of the Grey Wardens and made them take the blame for his own treacherous actions (putting a price on their heads and so forth - forgetting that this is a game, we had to fight for our lives several times because of that).
- Slavery. He deliberately sold elves to Tevinter slavers. A terrible crime by any standards.
- Attempted murder of Ael Eamon.
- Working with Arl Howe, knowing and supporting his own vile actions (which itself includes Treason against his own Teyrn, Lord Cousland of Highever).
Even by today's standards, those are worthy of the death penalty in any nation/state that supports it. In Ferelden, that's not even in question. Loghain's offenses demanded the death penalty, and the only way he could avoid it was by becoming a Grey Warden (seriously, without that option, nobody could stop Loghain's execution).
So, from a proper "historical RP" perspective, killing Loghain is the Just thing to do. His crimes deserve death.
As for Alistair, his reaction makes perfect sense, not only in light of the above, but also due to his own personnal situation. Loghain was basically responsible for the death of the man he viewed as his father. And it is made clear throughout the game that Alistair sees being a Grey Warden as a great honour, and truly cares about them. Granted, he's seeing the Grey Wardens throught rose-tinted spectacles, but his refusal to accept to work alongside Loghain is absolutely conssistent with this (especially since Loghain is responsible for the Grey Warden being decimated in Ferelden).
Therefore, I think it makes sense to have Loghain killed after the duel. It is the just punishment for his crimes, and though recruiting him as a Warden has a certain poetry to it, as a known traitor (who betrayed the wardens themselves, no less) it is difficult to justify any belief that he wouldn't betray us again. Given this, even if I accepted Loghain's surrender at first (he yielded), I would agree with Alistair that justice needs to be done given the magnitude of his crimes.
And I certainly dissagree with the thought that Alistair is acting the child in his refusal to cooperate with Loghain. It is entirely believable of anyone in his situation, regardless of "maturity" or "morality". The crimes Loghain did deserve death by any standards of justice in Thedas, and they hit a lot closer to home for Alistair (as evinced by the superb acting after Duncan is killed). To then expect Alistair to work with Loghain, and accept him as a member of the very organisation that he betrayed, is unreasonable. There is nothing childish about his reaction, it is quite simply entirely human (to expect him to grin and bear it, is to expect him to be a saint).
That said, I do have a couple of issues with the whole scene:
1- When Loghain yields to me, and I accept his surrender, it is automatically interpreted as me letting him live despite his crimes, and thus triggers the conflict with Alistair. This makes little sense. We just fought a duel, I won, he yielded. Of course I won't cut him down right there and then. That seems a natural thing to do regardless of his crimes. THEN would come the decision of whether or not he should die for his crimes of allowed to live as a Warden.
It's a subtle difference, but an important one. To kill an opponent in a duel who has yielded is dishonourable, but not so executing one for treason. Had there been an extra "step" of dialogue between you accepting his surrender, and everyone thinking you're going to let him live for good, it would have been much more appropriate IMO. For example, after you accept his surrender Loghain (or anyone else for that matter) might ask waht I intend to do with him, at which point you would have the choice of letting him go (which would be the one making Alistair angry), or having him executed for his crimes (or even imprisoned until after the Blight is dealt with).
The sequence of events would have been more realistic this way, in my opinion, instead of having everyone assume I intend to let Loghain live simply because I didn't cut down someone who yielded to me.
2- If you accept his surrender, and speak of having Loghain become a Grey Warden, there comes a point where Alistair makes the argument that becoming a Grey Warden is an honour, one that Loghain does not deserve. This is a good argument, at least for my character, but once you reach that point you no longer have an option to agree with Alistair, and (at least as far as I can tell) all your choices lead to further support for Loghain as a Warden, at which point Alistair decides to take the throne.
I wish there had been a 4th response option to agree with Alistair at that point, so that Alistair can make this good argument and not be locked into the "becoming king or leave party' path.
Finally, some have said that letting Loghain live is the pragmatic choice, as he is a great general and so would be more useful fighting the Blight. This is correct, however there is a good pragmatic reason to kill him as well. It is very clear that becoming a Warden is not a barrier to taking the Throne, since Alistair can do it, so what then could stop Loghain from mounting a coup later on? We know for a fact he still has supporters in the Landsmeet, and likely others we do not know of as well. After all he's done, he is definitely a danger to the future stability of Ferelden even as a Grey Warden, and therefore the best way to maintain the ensure Ferelden's unity is to execute him (same reason Anora wants Alistair executed on certain Landsmeet outcomes).
Anyway, I must say that I absolutely love the Landsmeet and the great impact your decisions have. Though there are a couple of flaws, the whole is definitely remarkable.
Thank you.
Itkovian