Inbox is unecessarily hard to clear
Clearing my inbox (which for me means marking email as read) is unnecessarily hard because: 1.) conversations sometimes do and sometimes do not get automatically marked as read (depending on the thread); 2.) there is a 1s delay before a thread sometimes does or sometimes does not get marked as read (even though the delay is set to "immediate"); 3.) the mark-as-read keyboard shortcut toggles between read and unread, so I often mark read mail as unread again.