As of 7:03PM PT tonight, the planned TUSD upgrade is now complete. 
New implementation contract: 0x7a9701453249e84fd0d5afe5951e9cbe9ed2e90f
Gnosis Safe TX that performed the upgrade: 0xbe0ee01abff79c4f4106c1924b1541d279501ada8a2a35db4d8ba885b246279a
This code has of course been fully audited and already reviewed by the AAVE team. Please let us know if you have any questions or concerns.