The main purpose of honing notes is to refine them and make them your own. There are many ways to hone your in class notes. Sometimes honing your notes makes them longer, sometimes it makes them shorter.
They should NOT be a neater recopied version of the in-class notes. The key is to learn how you want to sharpen your notes in a variety of classes because not all classes are the same.
Building intuition around in class and honed notes take time. It is very helpful to have teachers and professors provide feedback. This is a great way to use office hours and start productive conversations about the material.
Honed notes take time but they should help you study for tests more effectively and efficiently. Ideally, they will help facilitate retrieval practice, analysis, application, and productive conversations.