I think that Julian is going to be in more dance offs.
Sarah is an athlete, but comes from no dance background apart from watching her daughter. It's going to be tough for her to find the performance part of dance. But after all those gold medals, I guess that she's not going to be giving up and she'll work at it like a demon.
Julian is, I think, getting used to Strictly, its standards, and what needs to be done. I'm getting the sense that while he's fairly chill, he's also competitive, and he seems very clear about teaching.
I think that the combination means that the routines are going to be drilled into both of them, but they may not get the popular vote. When they get to the dance off, the footwork and lifts (I'm betting on a lot of lifts) will be well executed. That will likely get them through a couple of times.
I also like Mark. Having someone chill and who looks classically trained isn't a bad thing. I think that he and Tabby will go far.