Cutlass Jack wrote...
Honestly it really doesn't matter what David says in retrospect. We can only go by what's actually in game. Howe was evil, but he wasn't an idiot. He would not have attacked the Couslands if he thought Calain would be surviving the battle of Ostregar. The king made it perfectly clear what he intended to do to Howe following that battle, and Howe would be smart enough to know this. Loghain may not have expected Howe to murder them, but he did expect him to take the castle.
Yes, because what the lead writer of the game and the one who created Loghain as a character says is irrelevent. Well done.

A game, played from the perpective of a character, cannot reveal all the truth like the lead writer can. Ignoring what Gaider said is quite frankly arrogant.
Howe intented to kil leveryone in the castle, even the PC. So Cailan would not have known. That's what Duncan says. If Howe succeded in killign everyone, Cailan would have never known what really happened. He didn't need Loghain for this.
Cutlass Jack wrote...
The plan at Ostregar was Loghain's, not the Kings. And the man is an expert Tactician by nearly all accounts. The fact the torch on the tower needed to be lit at all for him to know to rush means that he was not capable of seeing what was actually transpiring on the battlefield. If he thought his plan would actually work, he would have acted on it.
But of course, it couldn't be more obvious he never intended to commit his forces to the field. From his objections over sending someone besides his own people to light the torch, to the comments he makes leaving the strategy session. He clearly has decided that the king is a lost cause.
He did not object to the Wardens going to the beacon. He was suspicious, but he went along with it. He could have insisted that Uldred goes there, but he didn't. That, in addition to the fact that he waited for the beacon is indication that he was going to join the battle, but had great doubts about it.
Mary Kirby said that though Loghain could not see the battlefield clearly, he could see part of it. In addition, there is the variable of time. Since it took time for the beacon to be lit, Loghain started to suspect. Were the Grey Wardens orchastrating a coup while the Orlesian forces march on Ferelden, hence why they are delaying with the beacon? Was the battle lost already? I think that's what went through Loghain's mind. And when the beacon lit, it was then he made up his mind.
David Gaider said that Loghain planned for the
possibility of retreating, if Cailan can't be brought to see sense. But it was when the beacon was lit that he decided to leave
for sure. He never planned to have Cailan killed, it was the idiot who wanted to fight in the frontlines, despite Loghain insisting that he does not. But Loghain did not want to fight at Ostagar from the very beginning, it was Cailan who insisted.
Cutlass Jack wrote...
Whether or not he intended to kill Eamon with the Poison is irrelevant to the fact it was premeditated prior to Ostregar. That things at nearly every turn went far worse than he planned is of course true. But he did plan it.
Yes, because Eammon was a bad influence. And RTO showed us that Eammon was seemingly pushing Cailan to marry Celene I.
In the stolen throne, Loghain acted by his instincts and they were usually correct. In Origins, they had some truth in them, but were exaggerated.