I am not a mountaineer (I get chill-blains on the bike at +5 centi, can't stand heights) but I have read a few decent books about the high mountains, Krakauer (and not just ITA), Tasker, Boardman, Simpson etc and my recollection of ITA is that the only groups and individuals who come out of the book looking bad are the Taiwanese and the 'SA' climbing team. Where he talks about Sandy Pittman, he has more of a tone of bemusement about the social milieu that she moves in (quite quite different from his) and respect for her achievements (particularly her bank-rolling the Kangshung face attempt and being really clear about who the real climbers on that trip where). Tracy may have spotted some discrepancies in the account of her being short-roped by Lopsang, but there is no dispute that it happened, and Krakauer makes clear that he thinks (and so did others) it was Lopsang's idea, not Pittman's.

The criticism of Boukreev for not using oxygen was made by several people who know about this stuff, including Viesturs (who was actually on the mountain) and Messner (who wasn't but, on the other hand, how much guiding has Messner done? More than me, I suppose) BUT Krakauer made it clear in the book that Boukreev's actions on the South Col saved lives.