Agreed with RAFIKI, the schedule of the Olympians has been nonstop for Carey and Chiles especially, and it would be smart to play the long game. Not saying they would be thrilled to miss out this year, but Antwerp isn’t really the priority. They proved what they needed to last year.
Biles upgraded vault in 2018 but that is, well, Biles. Not exactly the most representative example of what others can do.
Chiles also took a LONG time to have a viable second vault despite teasing one since 2017. I don’t expect a Cheng to happen overnight (if at all) after a break trying to gain back her existing skills. I could see her FTDLO returning for camp, prudent given how much her bid relies on floor.