I wouldn't base my conclusions on the notion that Trump is an idiot.
In the end, he doesn't really know what Golden Dome, AUKUS, or NATO-specific programs really are. Nor does he know the needs of the various commands.
As the chief executive power, he can direct re-orientation, perhaps to China as the main threat, and have military staff bring forward proposals on how to do it, with him being the stamp, not strategist.
A lot of other decisions or thought processes which we've heard, like reducing Army acquisitions including armored vehicles and attack helicopters, accelerating B-21 and overall larger missile buys, Golden Dome, outsourced shipbuilding etc, all seem geared toward making the Armed Forces leaner ahead of a fight and perform better vs China on a limited budget.
Australia is just that ally that's important to beef up, as well as others in the area, and it's definitely NOT unwise to re-examine if AUKUS really does what needs to be done and in a relevant timeframe.
If the current administration believes the best window (for China) for war is in 3-5 years, then they need to see how they can maximize regional capabilities within that time frame even if it comes at the expense of longer term buildup.