Was watching this video by Guns, Nerds, & Steel from a few months ago and saw some stuff I wish were still around, graphically.
The old Toolbelt: I like that it used to look like an actual belt - from A13 on, it and the UI are just kind of.. sterile-looking.
Some of the old item icons: The old rocket launcher, and boulders especially. Not knocking on the newer graphics and models we have now, but a lot of the older ones actually looked pretty nice.
Vehicle assembly: Needed some work, but looked interesting.
Containers: Opening a container and having the border resemble what you've opened.
What are some old things from previous alphas you all miss?