I use the Google Drive macOS Finder Plugin. In order to save local storage space, I don't sync all of my Drive folders to my computer. Unfortunately this means if I'm looking for something I can't find, I have to look inside my preferences pane to see if the file might be in an unsynced the folder.
A better system would be to show the unsynced items within finder, so I could explore the directories, and only download what I need. The unsynced folders and files could be shown in grey, and a right-click could give me an option to sync it to my local device.
Unsynced folders are shown in the preferences pane. This is great functionality, but it's not very accessible. (read: user-hostile)
In addition to being hidden away, this pane could use some additional functionality. It ought to show files, as well -- again, going back to my use case where I'm looking for a file I haven't synced.
Unsynced files / folders should appear in the finder window.
Sync (download) remote files / folders
Here's a masterfully crafted doodle of a right-click menu interface that allows for the download of offline (greyed out) items.