It’s a difficult one.
On the one hand, Jess is the top ranked AAer in Europe and there’s never likely to be a better chance for the taking than now. She probably wanted to give it a go, too.
On the other hand, as you say, she’s been rushed. With the attendant risks. And this would’ve been a good opportunity to get major international experience for someone outside the core, which matters. Whatever ails Jen doesn’t appear to be getting fixed, and there’s a big drop off between the A and B in terms of reputation and experience at the moment. Becky is a fragile veteran specialist in a selection process that tends to require a lot of AA rounds spread across the season, so there’s never any guarantee she’ll be available. It would’ve been ideal for someone like Poppy or Ruby.