They deliberately held back on revealing some of the skills like Earth and stealth for the pre-alpha campaign so that there would be new things to show the press later. As time goes on, more should be slowly revealed, but they will have to hold things in reserve, and some things I'd rather be kept a complete surprise to discover, like the Phantom Forest Lair. I want to go into that not knowing anything about it (well, except the meta-knowledge of about roughly how deep it will be).
