I think tech-demo is a little low, maybe beta. I agree that this game is missing things, but I think it would be much closer to more like skyrim minus the storyline. This has been said before but the phrase "Width of an ocean and depth of a puddle" has been used and it is fairly accurate. But the thing is, what were going to notice as players, is depth. And there are a ton of games that don't have a lot of depth. There are a lot of games that also follow the model that E:D is, where they release the game when it's playable and entertaining then keep making improvements, it's not uncommon.
With a game like E:D there are so so so so so many things that could be done to improve it, that it becomes hard to draw the line of "finished," I would be thankful that E:D doesn't follow a subscription model like most games like it. You only had to pay for it once, and I don't know of a single person who has played Elite and hasn't gotten at least there money's worth out of it.
As to your points,
I also want to make it clear that I am not fanboyishly defending this game. I started at release, didn't contribute to the kickstarter, and wasn't in beta. This is based on a couple weeks of game time and just playing after work and on weekends. I also have experience with this kind of genre of game (sandbox) so I figure I'm a decent bit qualified to commentate on it.
Now that I have covered all my bases I better stop this wall of text. Thanks for reading
read just the numbered points at least. Ya lazy