Combat in ESO is by far the number one complaint I see people make online when talking about this game. It's why a lot of people stopped playing, it's why a lot of people refuse to start playing, and it honestly needs to be addressed.
The floaty, unimpactful combat just doesn't feel good. That coupled with all of the weaving and animation canceling makes it just not fun or engaging.
Also, you've added multiple new classes but no new weapons. I think adding a few new weapons to the mix with new skill lines could make a huge difference in how people play their characters and roles in general. Why this game has been out for 11 years and not a single new weapon has been added is beyond me.