Excel 2016 on the Mac is just...let's put it this way: if you think using Excel on a PC is horrifying, you'll actually run screaming back to the PC after using it on a Mac.
I'm using it on a desktop where the only input devices are a keyboard and a mouse. No "Magic trackpad" or whatever. So the first sin Excel on the Mac commits is that it hides scrollbars regardless of the system setting to hide scroll bars either on/off or based on input device type. So you can't just grab the scroll bar and start scrolling. And worse, you can't really scroll with the mouse unless you want to scroll many lines at once. Crank on the wheel and you can scroll. Roll it a few clicks and the grid just kind of bounces up and down, snapping back to its original position. The good news is if you start cranking the wheel the scroll bars appear and you can drag them to where you want to be. Kind of.
It's great that Microsoft tries to do something useful on other platforms, but this is just...not useful. Fortunately I only signed up for a free month of Office 365 for the privilege. I'll stick to the PC version.
edit: biffzinker pointed out that, as it turns out, I wasn't running hte latest version that I thought I was.