Kreia, or somebody, said something to the effect of, 'Those that could not be made loyal to Revan and who were unable to be turned were apart of the atrocities committed at Malachor.'
If you think about it, Revan had an entire fleet of soldiers and generals and what-not in Knights of the Old Republic I. The atrocity at Malachor was obviously Revan's attempt to weaken the Republic before he made his plans for conquest against the Republic in order to strengthen it against what lay hidden in the shadows of Unknown Space.
My biggest question concerns the Exile then General apart of that Fleet -- can this be taken to mean the Exile would not have followed Revan had she maintained her connection to the Force? Is Kreia perhaps wrong in assuming the power Revan promised and what-not was impossible to say no to?
Such a question may be an inconsistancy generated from the lack of time they had. They are (the designers of Black Isle/Obsidian) well known for their excellent stories that strive to be different than the usual but it could have been another time constraint that left such a gaping hole -- The Malachor Chapter -- in the age of Revan and the Jedi Civil War.
My take on it is that he -- Revan -- knew what he was doing and had put those that would not conform easily to his ideas in an area where he knew heavy lives would lost. If you talk to GOT0 you gain information on how he sacked and destroyed only what needed to be destroyed, killed only who was necessary and I don't see how Malachor should be any different.
The Mass Shadow Generator comes into play since we know it was probably not apart of Revan's plan but a last-ditch effort; perhaps Revan had not planned for the Republic fleet to be that victorious. I'm assuming there was a frontal fleet that went head to head and dug down and was hitting the Mandalorians head on and there was a fleet somewhere nearby. I'm also going to go out on the limb and think the Mandalorians -- Mandalore especially -- are also doing the exact same thing and if all those play correctly, we can see how Revan defeated Mandalore there.
I, at first -- from what I know from KotOR'1, believed Mandalore was killed in a totally different location -- perhaps Mandalore -- and perhaps Obsidian over-looked that as well. Perhaps BioWare never intended Revan to be such a tactical genius and such a heavy-thinker plotting ideas and battles far into the future but he has certainly turned up to be probably one of the neatest and most interesting Star Wars characters.
As for the Exile, there's an inconsistancy in her being so... like Revan -- doing what must me done and expending resources that are necessary for victory, no more -- no less. If so, why was she the one leading and giving the go on the Mass Shadow Generator? Shouldn't she have been the one saving lives despite the outcome? I think it would have made for a better story if she too, didn't have to fight her own demons in the end (The Secret Tomb on Korriban) and was instead pondering if she made the right decision to save lives instead of absolute victory.
With how Malachor turned out, it certainly leaves more to be desired -- the Mass Shadow Generator really irks me as does the Exile's character since she seems so weak at times. She could have really been the polar opposite of Revan and her part at Malachor would be more consistant.
Its very hard for a gaming company to be consistant when its not their story, originally, but BioWare pulled it off and many have previously. I can't really say anything except that Obsidian has once again failed.