Me too!
The quite common situation is when Dorico decides to separate two staves by too much (to my liking), creating an “ugly gap” between say staves 3 and 4 of 10 stave page. I want to drag up staves 4-10 to “close the gap” while maintaining even spacing between staves 4-10. Alternatively, I could drag down stave 1-3. Neither is possible with the current concertina drag. Of course, I’d be interested if there’s another elegant solution that I hand’t thought of!