It's not at all the hardest release, that's the thing. Twisting a Winkler on the bar like
Rin Kawabata and others have done makes it vastly easier, but that faulty technique is not being penalized currently. It's H rating for something that's really E or F level, depending on exactly how cheated the entry is. Combined with the extra bonus for pirouette connection in the recent code, smart coaches should have jumped on taking advantage of this skill. Several of the Chinese girls could be reaping big rewards from it right now if the coaching was in place, and Gabby should be capable of it too.
@crdubb17 I think it's far less useful to speculate what Gabby could be capable of on Beam and Floor, because those events require a whole different kind of training and have more direct limitations, whereas with Bars it's easy to see from her prior skillset what she should be capable of. That's been clear ever since Gabby posted herself doing completely perfect Chinese pirouettes again.
As for "preparing an AA program", I think the smartest approach is to have at least one event that makes you undeniable for selection. That event was always going to be UB for Gabby, and this event is often one of the best ways to gain an advantage in the AA anyway.