In Excel 2016 on Mac, scrolling is absolutely awful. It jumps around across the page a lot, making in impossible to focus due to random page shifts. I have reported this multiple times with the frown. Here's a video:
http://www.reagentx.net/o/Excel%20Scrolling%20Bug.mov
Also, note the scroll bars do not animate when scrolling: they freeze and snap to the position the scroll ends.
This longstanding needs to be fixed. Excel is utterly unusable in its current form.