There is no way that current elemental and enhancement or going to get live in its current condition for pve. Well maybe they do get live, but they will need buffs after the first week. Blizzard is once again seeing other things than every progress shaman sees. It's been like that ever since, and every time (not a single exception) they were proven wrong.
Long story short, on PTR raid testing, enhancement are way at the bottom of the melee spectrum, and eles are dead last by a massive margin. Now typically this data comes from progress raiders, who have a really good understanding about their class mechanics and how to squeeze out every inch of dps.
Not going to bore you guys with the details, but I spend some time putting all shaman patch notes together since 4.0 and it's pretty obvious they either don;t have a good clue about shamans or it's less of a priority. Either way, expect enhancement buffs soon.