The lack of emacs keybinds is because they don't use standard Cocoa controls; unfortunately it's endemic to the entire Office suite on Mac.

Yeah, I just noticed the "can't drag pictures in" issue. If anybody from the OneNote team is reading these comments, this is a pretty big missing feature. Mac OS is all about drag-and-drop, and a well-behaved app (especially one that is supposed to be a notebook-type thing) should be pretty robust in its d&d support.

Interestingly, ^A moves to the start of line but ^E does nothing. Strange oversight.