One of the things that actually has me intrigued the most was the part in the IGN First video where Murray broke into that building and stole the thing inside, suggesting there are different ways you can get in there. I was just so surprised to see that the buildings we've seen in the trailers so far will actually have complex interiors to explore. Going all the way from space down to the surface of a planet and inside some buildings just adds to the sense of scale for me.
I don't remember them saying though that there will be buildings that will feel like "dungeons." All I've seen so far are singular buildings that are maybe two or three stories or small groups of two or three buildings together, each one being maybe a couple rooms at most. I know there aren't cities, but it would be really nice to discover that there are "castles" or larger buildings with more complex interiors that actually feel like "dungeons." Did they say whether the buildings are procedural like the ships are? What about the space stations?
The space stations in that gameplay video are another thing that impressed me. I kind of expected it to be like Elite where you just dock your ship and do all your business through a menu. But no, you can actually get out and explore the space station. I hope there's stuff to do and find in the space stations. It would be even better if there are other structures with interiors in space, but I'm not getting my hopes up.
There is a highlighted path on the galaxy map leading from your location to the center. They confirmed this in a video.