The UWP OneNote is so far from being feature complete compared to the Office 2016 OneNote, I cannot even remotely understand this decision. You are going to drive people away from OneNote to your competitors. I can't even open my local notebooks in OneNote UWP, for crying out loud. No click-to-screenshot, no checkbox tags, no tagging shortcuts (hardly any keyboard shortcuts at all), no customization of the UI layout, no section groups, no TODO, no tag search, no outlook integration, no format painter, limited file integration, no equation editor, no automatic OCR, limited inking (seriously how did you miss this one with the UWP version), no recycle bin, no find by author, NO PLUGINS COME ON, no multi-window, no quick notes, no always on top.
This is the most misguided decision Microsoft has made since Windows Vista and there is absolutely no need for it. You can wait until the UWP OneNote is actually in feature parity. Right now we are going to be actively exploring competitors.