Remove extra whitespace under AutoPreview text in non-Compact Mode
If you turn on AutoPreview in Outlook 2016 and the message list is in its wide mode, each message or conversation has about half a line of empty white space under each message's AutoPreview text.
I use 1-line AutoPreview, so this extra space steals over 10% of the available vertical space in the message list!
1) while viewing inbox, turn off preview pane or move it to the bottom
2) maximize outlook so that it will switch to its "wide" mode with sender and subject on the same line
3) turn on auto-preview and set it to 1 line
Expected: message's bottom border is only a few pixels below the bottom of auto-preview text
Actual: half a line of wasted space.
There isn't any wasted space at the top of the message, only underneath it.
It doesn't show up when AutoPreview is turned off-- in that case, the display is very efficient without wasted space.
Not everyone has huge, high-resolution displays. Using Outlook 2016 on a smaller monitor is less comfortable than ever before because folder-list items take up more room, so if you have a lot of folders you can't see them all at once. The ribbon in Office 2016 uses more space than in 2013 too - so there's even less space to see things with.
GMail has the "Cosy" and "Compact" modes - desktop Outlook would be well served by adding similar functionality.
I also want an ability to hide folders and nodes from the navigation list when in Mail mode. I don't use Groups and Search Folders, for example, so why should they take up valuable space?