Giggles_Manically wrote...
Khavos you are aware that plans go wrong in war all the time correct.
The signal was lit to late, which alistair alludes to after the ogre is felled.
The cutscene shows cleary that the entire valley was full of darkspawn and that the Ferelden forces were strectched to thin. Loghain could have charged, but if he had lost then what?
You lose your king, your army, your generals all in one battle.
Calian forced a bad plan, by not waiting for reinforcements from Redcliffe, and thus Loghain was stuck with a very bad plan.
While it seems harsh saving half your army is better than losing the whole army.
What if the battle at Denerim had been lost? That would've been pretty much everybody, and larger army than Ostagar.
And, again, if your motives are pure, you don't kill the survivors of the battle to prevent them from spreading word about what happened. You also don't let your closest ally massacre the family of one of the king's allies. You think Howe would have taken out the Couslands if he expected Cailan to be around past Ostagar? What was he going to do, turn up in court and go, "Hey, I went to see the Couslands, and they've vanished! So I took over all their lands."
There's literally no evidence beyond Loghain's own assertions that there were "too many darkspawn" that suggests Ostagar was anything but a power play for control of Ferelden.