klarabella wrote...
But with this knowledge, how can you change the Battle of Ostagar to make actually sense and still make Loghain's decision to retreat sound ambiguous (so his claim the battle was unwinnable could be valid or not, how would he even know that from his position)? And what's the point of sending someone to light a beacon if this battle could be a matter of days?
It's very interesting for me, as I was trying to write down a playthrough and get rid of all the plot holes.
As far as I have ever been able to tell, Loghain couldn't tell the battle we see in-game was unwinnable (even if we assume that it was), because the entire point of the beacon was because he could not see the battlefield himself, he needed the beacon in order to alert him that the time was appropriate to attack. If he could see the battlefield, he could have determined the right moment to attack on his own.
But if you wanted to make it seem like a clear betrayal at the moment, then somewhat justified later if you talk to Loghain, it would actually be rather easy. Redesign the appearance of the tower a bit so that it has external battlements (This would make sense anyway: have you ever looked at the top room of the Tower of Ishal and wondered 'so, where exactly were we supposed to watch for the signal from? There's walls all around! As it's designed, the tower is a completely useless military structure because it has no battlements for archers to fire from and no vantage points to observe from.) and then have Loghain see the darkspawn on the tower (the ones that ambush the Warden and Alistair immediately after they light the beacon). If Loghain saw those darkspawn, he would have immediately known that the darkspawn were able to attack the army from the rear and there was no way they could hold. It could easily be a quick glimpse - something that no one else notices - and thus leave it entirely questionable as to whether he was telling the truth or not.
Even if the battle could take days then, the beacon would still be important for timing the attack, to inform Loghain that the darkspawn forces have fully committed to the fight. Important because if they haven't fully committed, Loghain's charge could be caught in a bad position and destroyed. And if they just said, for example, wait six hours, who's to say the darkspawn wouldn't discover Loghain's position by then and attack? The charge has to come at the earliest appropriate moment, the beacon would be relevant even if the defenders were properly set up to hold the line for days of fighting.