That tumbling isn't anywhere near close enough to be useful to the US team. Given her floating kneecaps and fragile body (comparatively speaking), I doubt Ashton could produce a useful floor, let alone vault, in just a few months.
I'm guessing she'll be on the team as a bars specialist, but she sure doesn't have a guaranteed medal. The European and Chinese bars girls have created a fiercely competitive field, and Locklear's mid-range difficulty might not hold up.
Off topic, but kinda not, it may not even be a US AA champ this year. The new girls aren't yet a bastion of consistency, and Liu Tingting, Mai Murakami, Ellie Downie, Zsofia Kovacs, and Angelina Melnikova could all make a push for gold.