Even though the skaters you mentioned had a lot of potential, it seemed like the USFSA seemed ready to drop one of these skaters if there was a more artistic skater in the wings. Nagusu and Flatt had a lot of potential around the 2009 - 2012 era, however, USFSA was on the lookout for an artiste. During this time USFSA had their eye on
Czisny and Wagner for the 2010 Olympics. Czisny was having a good Fall 2009 season, but a bad season ending in 2010. Furthermore, USFSA wanted Cohen to come out of retirement to go to the 2010 Olympics instead of Flatt or Nagasu. Cohen once again underperformed in the LP. Wagner was close, but Czisny also underperformed at US Nationals.
At that time, I felt that USFSA didn't like Zawadzki very much. She was injured in 2012, and post-injury, she didn't perform well.
By 2014, USFSA was high on Gold and Wagner. Even when Wagner finished behind Nagasu at Nationals, USFSA chose Wagner over Nagasu to go to the Olympics. Polina was a nice addition to the US team at the time.
By 2018, we had Bradie Tennell, Karen Chen, Wagner and Nagasu in the mix for the Olympics. Gracie Gold withdrew from competition, Tennell exploded onto the scene, Karen Chen broke through in 2018, Wagner had a good quad and Nagasu was improving close to the Olympics. For the US Olympic team, Wagner had many supporters, and it still seemed like Nagasu needed to campaign and fight to make the team. It was in 2017-18 where is also seemed like Wagner was starting to rest on her laurels. Even though she finished fourth again at Nationals, her body of work wasn't enough to save here.
Hopegully, Alysia Liu and her peers will bring the US back to the podium.