I'm most excited for the environment updates. One of my main issues with the game is that every zone is just a big empty field. They just can't add a lot of the little details that make areas feel alive and lived in due to current engine limitations. Not only is this uninteresting to look at and play in, it really snaps me out of the story when an NPC says "be careful out there in the jungle" and the "jungle" is five trees and a couple bushes scattered around. Even Radz-at-Han, which is supposed to be a bustling trade city, is mostly just empty rooms.
Going off of the example shown in the graphical update preview it looks like that will be a thing of the past in 7.0 and I can't wait. I hope they do a pass like this on some old zones as well, especially the main cities. :D
https://i.redd.it/muivv5sh5ri81.png