Ashley is definitely the "darling", no questions about it. But what's good about it is she's earned it: she had a good GP run last year, strong nationals, kicked *** at 4CC, strong worlds, strong Japan Open, strong Skate America...she's a strong skater and her record is showing she's a strong competitor. So if by chance she has an off night, which will happen eventually, she's earned the confidence of the federation to get a look-the-other-way pass because they know she's good for it. Additionally, she's earned the respect and favoritism of the international judges which isn't an easy task. She's receiving a significant hike in PCS and GOEs b/c she's one of the favorites and that's not something the USFSA will pass on. That's the reason they sent Alissa to worlds last year b/c even with a few mistakes her favor with the judges would help her out; obviously they weren't expecting the epic sized meltdown she had.
So Ashley's spot is pretty much set. I'd say Gold was the clear 2nd but there a rather large asterisk next to her name now. She's not really proving herself to be a reliable competitor so far this season but she has time to change that. If she has a strong showing at COR and then nationals, she'll more than likely be the first choice for that second spot. However, if by chance Christina has a strong showing at her next event and nationals, or Mirai does well at COC and nationals, I think the decision will be tougher. Christina and Mirai are far better all-around skaters than Gracie is, so it would come down to sending the best overall pick.
I don't see Alissa or Caroline being in the mix. Agnes is a bit of a wildcard too...as far as juniors go, the most promising one is Angela Wang. I seriously doubt they'd send her to senior worlds but she's a lock for junior worlds at this point...she's another great technician like Gracie but she's got a lot of what Gracie lacks in terms of presentation, artistry, interpretation, etc.
Nationals is going to be crazy this year, that's for sure...