@Stephanie Yes, I am suspecting the "motivated" skate mom angle, but I don't want to presume as I haven't heard rumors about her mother, as opposed to a few others.
I think Edmunds had a very different situation going into the Olympic year though. As you said, she won both events and made the final. While we don't know how Hong will do, the insanely strong Russian and Japanese contingent year after year on the JGP makes that feat seem hard for Hong to accomplish (well, the winning both events part).
Also, when Edmunds went in 2014, there wasn't a strong group of US ladies fighting for that third spot. Wagner and Gold were pretty much locks, but there wasn't really anyone I'd say was a strong candidate for that third spot. Mirai could have been (she had gotten one GP medal each preceding season), but she didn't have a coach, which doesn't exactly make USFSA confident heading into an Olympics. Gao and Zawadzki hadn't medaled at a GP that season. Cesario, Hicks (at that point), Miller, Cain, Long, Bell, and Kaiser hadn't gotten any Senior GP medals. Miller, Keiser, and Gao had made the JGP final, with Miller getting 2nd the season before the Olympic one. Still, the Olympic year Miller only got 12th at her one JGP. So that's a total of only three US ladies that had medaled at a Senior GP to that point, with only one (Wagner) ever making a Senior GP final. All in all a pretty weak field for the 2014 team. None had medaled at Worlds.
Going into 2018, it looks like it will be a lot different with a lot more depth. We have 4 ladies who have medaled at a Senior GP during the current Olympic cycle (Wagner, Gold, Bell, and Hicks), 6 ladies who have medaled at a Senior GP in their career (Wagner, Gold, Bell, Hicks, Zhang, and Nagasu), 2 ladies who have made the GPF (Wagner, Gold, and Zhang), and one who medaled at Worlds and the GPF (Wagner). To add to that, 4 (Wagner, Zhang, Edmunds, and Nagasu) have medaled at 4CC. That's not to mention that all the top contenders but Wagner (Chen, Bell, Gold, Zhang, Hicks, Nagasu, and Edmunds) has medaled at a Senior B this Olympic cycle.
It's not that that means we necessarily have a guaranteed Olympic medal with the Japanese and Russian teams this Olympics, but it means we have a stacked field at the National level competing for those 2-3 spots on the team, so making it will be insane.