Wood's power is massive, but the strikeouts are a concern. Its good to hear that he is working to cut them down, because if he does, he will be lethal.
Right now with the strikeouts, his upside is Troy Glaus circa 2000-2001 with less walks, which is pretty nasty. He can hit .250-.270 and still be a fantasy stud because of his power.
Scouts seem to think he'll be an average defender at SS, but out of necessity, the Angels are giving him time at 3b. He'll be up at some point this year. He won't hit for much average at all in his initial exposure, but how he adjusts will determine just how good he becomes.
As for Humberto, i think he'd fair better in the pen. If he sticks at starter and remain healthy (a big ?), he could be similar to the current version of Javy Vazquez. I think he'll see the show this year as well at some point.