When Microsoft announced this change, I forced myself to make the OneNote Win10 app my primary way of working with OneNote. I've got to admit that I now prefer the new app most of the time. In my experience, it "feels" quicker than OneNote 2016 when working with my dozen or so large notebooks. One of the key missing features was inserting Outlook meeting info into a notebook page, which Microsoft added in the last few months. I also use the OneNote button in Outlook to turn an email into a note page, and I heavily use the flagging of text in OneNote to be a task in Outlook. (Critical feature for my personal workflow.) If Microsoft addresses those two, I think I'll be good to go. Granted, I only store notebooks in OneDrive/SharePoint, so I don't have an issue with Microsoft not providing a local storage option.
Microsoft