I'm not so sure about that. Yes, Minecraft is a game about discovery and this is pretty much how it goes from the moment the player spawn into the world, there is nothing saying you should punch a tree and make wooden tools (at least back in the day), the player is suppose to figure that out on their own, in this regard I think a clone does need to follow the same design spirit.Minecraft is very much a game full of arcane mechanics and odd discoveries, and always has been really, even down to how early versions of the game had NO craft guide and NO item/block names visible in the inventory. Therefore Minecraft clones should replicate that. That's kind of annoying to say as we might disagree with the original game's design, but really, it just proves the point again that clones are not as good as creating something original.
Nonethless, there is a considerable difference between figuring out punching a tree and healing zombies or going to the Nether, Minecraft design philosophy rely on intuitiveness to discover gameplay and that is where it falls flat, because the more complex the game get the less intuitive it gets; for example, the comparator is impossible to figure out without external help. Mineclone is a 'clone' but it is also a different game and it can add it's own structures and gameplay choices to follow the spirit of the game and not a 1 to 1 copy.
The Igloo is too convoluted, the player has to discover and solve has a ice puzzle before even get to see the villager and the zombie but, it is an building design to teach a mechanic that is the point I was trying to make, I'm certain Wuzzy can design a better structure, more intuitive to teach players they can put a Pumpkin over Snow to make a golem and encourage them to to the same for other nodes and see what happen, the problem I see is the golems and the wither follow slightly different logic and that may require one building for each, if he decide to follow this type of tutorial.