Smart Art in OneNote
You should include the Smart Art feature for students to insert nicely organized charts and diagrams into their notes. Trying to insert shapes and arrows is painful in OneNote.
Title says it all
Colin Campbell commented
THIS. Not everyone uses OneNote to clip things from the web- some of us use it to plan projects, collaboratively design new concepts, or even just to take notes from a lecture we're attending. There's got to be easy tools not only to draw, but to build sharp looking diagrams.
Microsoft Office already has this functionality: "Smart Art" in Microsoft Powerpoint, which means it should be *relatively* easy to add as a feature to OneNote- it doesn't have to be built from scratch. The truth is that if only one MS Office product could have the Smart Art functionality, I would pick OneNote over Powerpoint; but there's no reason we can't have both.
OneNote is already a great product, but this would make it SO MUCH more desirable.