Agree - not sure how strong Australia really is this year. BG and Maya I think have faced Cambage in China last year. And international centers are used to playing both down low and outside - much more normal than US college training - many with range to the 3 point line. And so they are also used to having to defend in space. Stef's defense in both the scrimmage and the friendly was very suspect and Lavenders was not much better, but she looked to have better foot speed. To be honest, I thought Tina didn't look good at all on defending pick and roles either as she was often caught out of position, and no one was impressing me with help side defense.
I am still hopeful for BG, but think USA should be able to overcome her absence with whoever they chose, but the margin for error is much smaller.