Everything except how to actually do anything.
Blockland offers a tutorial on how things work.
Minecraft tosses you into a world with no knowledge.
If you want everything offered up on a plate, play Terraria. Crafting is as simple as it gets in that game. In Minecraft, you either have to look up recipes online, or figure out how to make the little amount of content using a 2x2 or 3x3 grid.
This is very true, and it is one of the things that is the most annoying about Minecraft, particularly when you begin.
There should be some form of tutorial function. Something that covers the basics of how to break blocks, place them, craft a few items and fight creatures. Hopefully such functions are created nearer the time that Minecraft goes fully retail.
And the crafting thing is a nuisance.
I do have to head to the minecraft wiki page every time a new crafting recipe is released in an update, and to begin with, I had no idea how to create most things, beyond planks and a crafting table.
Minecraft is good, but it still leaves plenty to be wanted. Some basics would be nicer to have covered before more extravagant updates.