Shawn is getting some of the highest scores of the competition on vault - comparable to Cheng Fei's, who is a multiple world champion on the event. Her bars scores may look low to you, but her start value is quite low - I believe it's a 6.3 compared to a 7.7 for the top competitors - her routine is essentially two releases and a difficult dismount. In addition, while she stays clean in her form, her swing lacks dynamism, and in team finals she was off on some of her handstands. Her routine is "solid" but not virtuoso. On beam her scores do seem a little low, but she is being deducted for incomplete split positions on her jumps (nowhere near full split), and perhaps for insufficient artistry - her routine is all skills with little flow or dance, and while it is clean, it lacks some of the qualities of posture, extension, and movement that ought to be shown on the apparatus. Her score last night seemed more fair than in prelims. Beam judging has been strange across the board this competition, with ranges on the B-panel such as from 8.8-9.3 for athletes, which should be unacceptable. This is happening for everyone. On floor, she has watered down both times from a planned 6.4 A score to 6.2, and is losing credit on some of her dance elements - split elements not sufficiently split and jumps not properly completed. Nevertheless she received the third highest score in prelims.
Overall, while scoring might be tight, it is not noticeably unfair. Scores in the USA are notoriously overinflated - viewers therefore become accustomed to scores like a 15.8 score for Shawn on bars, a score which would have earned her a place in bars finals here - clearly not an appropriate score - or scores in the 16s on floor, where a 15.5 in the Olympics would be the highest of the competition. Moreso than being ripped off here, she is being scored fairly. Remember, this code was supposed to judge harshly on the B-panel to discourage badly executed gymnastics and encourage perfection and artistry. While this hasn't really happened as an overall effect, the judging in this Olympics does seem to reflect this intention, and therefore athletes with superior execution and form are being rewarded. Some of the deductions being taken on Shawn are precisely those which the code promised to judge harshly, and are finally being brought into effect.