It's a good game. I had an argument with Arthur Satine, and he had played it in the early days, he started playing it, and he enjoyed it, the problem is Minecraft takes your imagination to really enjoy. People who call it 3D legos, haven't actually played it.
Survival is no less difficult than Demon's Souls. Perhaps even more difficult. This coming from someone who platinumed Demon's Souls and made Youtube videos about the game. There's crafting, enchanting, you use levels to make your gear more powerful, make potions, and poisons, I HATE fighting witches because they can poison me and so then my diamond gear with all these buffs doesn't help as much.
You can crank it up to hard, you can make it to where 1 death and you're done, and on the harder difficulties survival is extremely difficult. There's a whole lot to learn, and experience, once you die you have 5 minutes to get back to where you were, which can be extremely difficult, so it helps to build strategic locations to store things, but if you don't build it right and a creeper blows up the wall, AND yourself now you've lost everything.
It's a very difficult game...
But only if you want it to be. You can crank it up on peaceful, and just enjoy that aspect of it. The Lego part peopel refer to. You can build electrical devices, and people experiment with programming...
I haven't even gotten to the end game stuff. The Nether, the End, the Ender Dragon, the Wither Dragon, PVP matches against other people using custom maps, and then you start getting into mods, and servers...
I don't know how anyone can call it overrated. It lets people enjoy the game the way they want to. Extreme challenge, exploration, creativity, art, engineering, interior decorating, modding, mini games, it's everything a Lego Game should be, the only downside is it doesn't have the best story, and the original graphics can be off putting.
It's by no means a bad game.