You can already check the PTS patch notes here to see what's coming:

https://forums.elderscrollsonline.com/en/discussion/671932/pts-patch-notes-v10-3-0#latest
https://forums.elderscrollsonline.com/en/discussion/672287/pts-patch-notes-v10-3-1#latest
https://forums.elderscrollsonline.com/en/discussion/672531/pts-patch-notes-v10-3-2#latest
https://forums.elderscrollsonline.com/en/discussion/672840/pts-patch-notes-v10-3-3#latest
https://forums.elderscrollsonline.com/en/discussion/673187/pts-patch-notes-v10-3-4#latest

Notably, there are very few Class changes, and most of them are only bugfixes rather than actual changes. It seems the combat stuff all went to the Vengeance tests with the exception of a few set changes.

U45 not have any class change