You can see a lot of the details of patches here
https://wiki.project1999.com/Patch_Notes
Jan 2001 is the next era and just taking a glance should see:
Class based penalties removed
Many spell updates
Root and snare stacking
Theres probably a lot more in there too. Hotbars 7-10 should get fixed
Maybe druids will be able to track further than they can extend their arms