iOS/OS X Notes is pretty good when you add the Apple Pencil. For some reason OneNote on the iPad Pro isn't as responsive with the Pencil.

A good example of what could be a subtle change making a big difference is both creating new note & deleting an existing note happens instantly now, past versions there was some a brief lag. This is part of the reason why even a little bloat can really suck in anything you use multiple times a day.