I haven't seen these prototypes before. Thank you for the links.
So many interesting parts. It is amazing to me that TLG has revisited so many of these ideas in later sets and IMHO to better effect.
The mine set is amazing to me. It looks more like a MOC from today than a set. In the mold of the MMV it looks almost too good. The sloping techniques for the mountain are incredible. Is that an animal coming out of the doors on the left? Those also look like some large 45 degree panels I've never seen before?
On the Loch Ness set nice find on that round turret top. The round tower piece seems to have an arrow loop size opening in the side as well? I would love to get my hands on that old dragon version of Nessy. I bet I know what Nessy wants from those old scottish nobles... Tree Fiddy!
The U prototype castle is the closest thing to a UCS castle I've ever seen. It is very large with two gate houses and tons of figures. The dragon shield in so many colors would be sweet. Check out those trees! I would give my first born child (If I had children that is...) to get a hold of those brown octagonal pieces for tree making. I don't think I've ever seen those in brown before?
I heard about the horse skeleton from yesteryear but didn't know how factual it was.
The crown is certainly interesting and the goblet is chrome is great. The kings robes look well... let's just say he is pimped out...
The two towns while awesome take place more in high middle ages or in the Renaissance. All of those hats and hairpieces would certainly be welcome. Are those hanging signposts actual released lego pieces? While the rounded window frame is interesting I don't think I would use it for castle mocs. The rounded shutters on the other hand are awesome looking to me. I would love those steep slopes in old grey. Does anyone have an idea how did they do the tudoring in that last village?