Yes, the Details dialogue is a list of changes made by the plugin, but you are wrong on the "no functionality" part. Select a change, then hit "Delete" on your keyboard. That will mark the change as ignored, and that change won't be loaded into the editor the next time you load that plugin, and therefor the change won't ever have happened when you save the plugin. That would be its primary usage, I suppose.
As for keeping track of changes in many areas, it's common practice to Prefix newly added things to the CK (or seems to be) with something that you can easily identify them with. That way, you can filter for your newly added weapons, jump to your interior cells/worlds faster, etc., etc...