Something else to consider is that indeed I believe that Shepard's reaction is in major part due to the fall of Thessia as a whole, not "just" the mission's failure. The thing is retrieving the data later on will be possible, but you can't go back in time and save Thessia, nor could Shepard just start single-handedly punching all Reapers on Thessia to death to save the very planet itself and most of the Asari's culture.
Additionally, very important, is what Shepard says back on the Normandy when reporting to the Asari Councilor: « I'm... » * transmission ends * «... sorry.».
The Asari Councilor wasn't aware of Kai Leng (I think? can anyone confirm? I haven't played since my first and only play-through until that part in weeks now). Shepard trying to say h/she's sorry to the Asari Councilor pretty much concerns the fall of Thessia itself. I don't think that Shepard would go all dramatic-looking and be "sorry" on a personal level to the Asari Councilor if it had been a question of mission-specific report, Shepard wouldn't be sorry for failing a mission and saying that to the Councilor, or at least not including that much emotion with the look of a depressed person.
And, last but not least, the actual track from the soundtrack, "I'm Sorry", listen to it, and picture the fall of the home world of the oldest race of the current cycle and arguably the most important of them. That track alone expresses the fall of the Asari AND Shepard's "failure" on a personal level, it's NOT a track about failing a mission or some military objective. Well that's how I see it anyway. Shepard is too cool to feel that sorry about simply failing one mission, she's a Marine, there's no perfect military careers, there's always one or more dark spots on your sheet of paper. But seeing the Asari's home world falling while you're physically there and powerless to do anything about it... now that can have its own weight on Shepard's consciousness.
Modifié par Lyrandori, 02 avril 2012 - 04:55 .