It is now possible to migrate your vaults to the "Format B" style that uses a fundamentally different structure to store your data. It's more resilient and much more efficient, which should result in faster unlock times, smaller vaults and less risk of conflicts/data-loss. It is a beta feature and is recommended only if you have backups of your vault (in the stable format) and are willing to take the risk.
Google Drive functionality has been updated to mitigate short authentication periods and broken re-authorisation processes.