Is there a way to see overall status of iCloud Drive in macOS?
Yosemite
You can watch individual files in Finder, but there's no GUI for the progress of iCloud changes.
El Capitan
In El Capitan and later a progress bar can be accessed by clicking on the wheel in the Finder sidebar.



https://georgegarside.com/blog/macos/all-the-little-things-osx-el-capitan-hidden-features/#icloud-drive-upload-progress-indicator (my blog)