The addition of side-by-side diff view in Stash v2.11.2 is GREAT and our Dev team is very appreciative. A number of our projects have some rather large source files and one request for improvement has been to have the side-by-side diff view show only the diffs plus some amount of expandable context. I.e. similar to the expandable context in the "unified diff mode" except that the diffs are shown side-by-side rather than in-line.
I can see how this might be tricky to implement and so if it's not possible or able to put on the roadmap for some time, I think the feature request in
STASH-4427 (add keyboard shortcuts/links to jump between diffs in side-by-side view) is a good start.