All previous versions of Excel, both Windows and Mac, display only a full row at the top of the window - regardless of the row height. The problem is that in Excel 2016 they broke the scrolling hysteresis so the window bobbles up and down far longer than it
should instead of quickly snapping to each row.
This seems to be a separate problem from the entire window snapping back to the original row when the mouse scroll wheel is released after moving dozens of rows up or down.
Microsoft also broke cell selection. When you tab or cursor from cell to cell, instead of moving the focus immediately, the selection glides slowly from one cell to another. Somebody may have thought this was an elegant approach, and maybe the focus even moves
as fast as it did in prior versions, but the perception is that Excel is lagging.