I will watch nearly anything the Winter Olympics has to offer, but figure skating is my particular passion.
Re: Wagner vs. Nagasu: Yes, Wagner had a poor free skate and a hesitant short program at Nationals, but in terms of consistency, Nagasu has had big problems of her own in that area since 2010 and her fourth place finish at the Vancouver Olympics. Sure, she's finished second and third at recent Nationals. She's also finished seventh. Twice. She's also frequently been downgraded on her jumps due to under-rotation even when she's skated cleanly. In fact, at the recent Four Continents competition, she placed tenth, the worst placement of all three U.S. women (and the other two did not do as well at nationals as Nagasu) because of multiple deductions due to improperly rotated jumps. It doesn't help that she's currently skating without a coach, which would make the USFSA wonder about her consistency in training as well. Wagner, on the other hand, has been more consistent in the last four years and is responsible for getting three women's spots at this year's Olympics. Beyond that, the rules for choosing the Olympic team are clear: Nationals is to be considered only one factor in choosing the team. In the past, except in cases of injury to a top competitor that made it impossible for that skater to compete at Nationals, USFSA has gone with the National medalists, but they're not obligated to do so and all the skaters knew that going in. Do I feel bad for Mirai? Sure. But I also understand the reasons behind the decision, and it wasn't made without regard to the rules that everyone involved knew about ahead of time, even if casual skating fans who watch only during Olympic years weren't aware of those rules. Really, what created the situation in the first place was the totally unexpected skates of Polina Edwards, the silver medalist at Nationals. When it comes right down to it, given her lack of senior experience nationally and internationally, they might have left her off the team but her second place finish made it difficult to do that, though they did have to consult the rule book to determine whether her junior international results could be factored into her statistics when determining the team. If they hadn't been able to consider them, the decision might have been different, but the rules stated they could be counted the same way as senior results are.
The same kind of decisions were made in other countries as well. Japan chose Takahashi for its men's team, despite his poor performance at their Nationals. Plushenko wasn't even able to complete his nationals performance, the only competition in which he took part this season, and Russia still put him on their team. They're also made in other sports--gymnastics, for instance, takes more than its national competition into consideration when its Olympic team is chosen.