At the very least you need to be able to right click stuff and go straight to the wiki page for it. The game itself is horrible at guiding you through achievements and crafting. There's just no way to do some stuff without external guides.
I could go for that.
Telling my friends that they need to buy specific maps cuz they didn't log in at specific times puts them off. They take couple month breaks and it gets harder and harder to get them to play each map they miss the unlock for.