Either make the Windows 10 version feature rich, or abandon it in favor of continuing OneNote 2016
There seems to be indecision and lack of direction when it comes to OneNote. Are there two different teams developing it? Has development stalled?
There are several features in OneNote 2016 that are not available in the Windows 10 UWA version. The most major one being the ability to searching image text converted by OCR. Please decide which product you want to succeed.
I personally have tried using the Windows 10 version for several months and had to abandon it in favor of the 2016 version.
Micah B commented
Having two desktop versions of OneNote for Windows makes it confusing when discussing issues online, and you have to spend a lot of time first establishing a baseline to ensure the other users understand the difference between the two applications and know which one you're talking about.