Fixed it!
FYI - If anyone searching for this issue needs assistance, here's how I fixed it:
1. Turn off iCloud drive in System Preferences (Make sure you backup your stuff locally first)
2. Go to ~/Library/Mobile Documents in Finder (its easiest to use the Finder/Go menu and paste the above - It may have a string of numbers next to it.)
3. Delete above folder.
4. Turn on iCloud Drive
This should allow stuff to re-download and syncing should commence.