Just based on the first two episodes, she does seem to bring a bit more energy into the judging.
I figured there were was a shortage of duo and speculated if there was going to be some last chance to get int all the knocked out duo get new a chance next week. Though based on the preview for next week, it doesn't seem to go so well for some of them. The season preview clip already spoiled some but I managed to forgot all of them.

Also, that one team challenge looked wet.

Might be the first under not ideal conditions?