Yeah, really enjoying it, it's very clever. Seen a few people complaining on the Steam forum that you can no longer just put down a blueprint and randomly throw materials at it, but personally I think the way they've done it adds to the immersion.
Not sure how I feel about the quick inventory/lack of hotkeys though, it's annoying having to open your inventory every time you want to swap between equipment - even if there was just a dedicated hotkey for the basic tools e.g. the axe, would be a nice improvement.
Found a couple of annoying bugs with the building - can't make a gate in the defensive wall, seems to be quite a common issue, so hopefully fixed soon, and also you can't destroy defensive walls after chopping the spike into the top