I see they still haven't added mechanical objects. You apparently only have the option to create openings, not the doors to fit into them. With monsters roaming, that might be problematic. Or who/what gets access for that matter. Not even sure if I have seen a door in a Landmark video yet.
That being said, I am sure it will be added, and this game is going to make a fortune. The build aspect of it seems to shit over all other competitors, which isn't surprising considering this is the first AAA minecraft with funding to match. The Yogscast did a kickstarter for a building game like this because at the time there were no competitors for minecraft. Yogventures. If it isn't vapor already, I think it might as well be. Don't see any competitors for this game until perhaps Titan or whatever the next blizzard game is. I have a sense it will feature heavily on building things as well.