Krom, I agree with you if you want to take hunters as an entire class. But if we take shamans as an entire class, we have a very fallacious argument because they have more than one role. Because hunters are concentrated, yes, there is more to use, however I would not necessarily argue that all of it is ideal for all specs. The usefulness of hit rating, haste rating, agility, MP5, and to a lesser extent int are debatable between specs.
For example, the single best DPS improvement I can get on my back slot is the cloak from Teron Gorefiend...which has zero agility on it. Compared to the cloak off Kael, this is actually really a downgrade because the rest of the raid is suffering from less benefit off Expose Weakness. In fact, it takes a fairly convincing argument to have me downgrade agility in any slot. If I do a search on equipment based *solely* on agility, this is what you will find for top items, (excluding ridiculous choices like C'thun cloak,) with bolded items being T6 gear.
Back: Kael, Shade of Aran, badges
Chest: Illidan, Kael, Hydross
Feet: Vashj, Solarian, Shahraz (leather, and just 1 better than badge boots)
Finger: Hyjal rep, ZA bonus, Hydross, Magtheridon
Hands: Attumen, Azgalor, Gruul
Head: (eng goggles), Archimonde, Zul'jin, Illidari Council
Legs: Azgalor, Void Reaver, Kazzak
Neck: JC blue, Kael, 3 kara items -- neck choices are horrid
Shoulder: pvp, Shahraz, more pvp, Nalorakk, Void Reaver
Waist: crafted (leather), Anetheron (leather), Vashj (leather), badges (leather), Essence of Anger
Wrist: Teron (leather), Rage, Solarian (leather), some crappy picks after that
Weapons (1H): ZA, ZA, Anetheron, Al'ar, pvp, Al'ar, BBW
Weapons (2H): ZA, Naj'entus, Malacrass (lol @ druid staff), Malchezzar
Now, obviously I'm taking agi in a vacuum. It's possible the #1 item on this list is not the best choice. However, it's not going to be further down the list than 3 or 4 for a surv hunter. How many of those items are from T6? You've got maybe one per slot, and as I just alluded, it might not actually be an upgrade. However, if I look at my goal equipment, not all of it is T6 (and none of it is PvP.) With how much mail crap I see that is not for any hunter, I can't imagine the enhancement shamans are THAT much worse off.