This will be with us tomorrow, new company new rules, but say goodbye to the current 10 man version of Tiamat tomorrow to be replaced with new version.
For the list of changes, here is your reading:
We are anticipating some changes to the wizard but even of last week that was unknown.
How to get new gear
Here is a document and video explainer
https://drive.google.com/file/d/140a1AOnHb-jvfUtY7aC-xDNLO7ABScEn/view