From what I could tell from the new Dungeon Magazine, some of the new abilities are outlined there.
Wild Empathy seems to lower the DC for skill checks relating to animals and other natural animals by 5. In particular it is mentioned that a Spot and an Animal Empathy check are lowered by this. So I imagine it is any interaction.
The favored enemy is likely beefed up, as a ranger below 5th lvl had Favored Enemy Elves (+2), though it seems to be of a narower focus.