NEARLY all of them, I'm sure subtlety rogues would disagree with you.
Who says there needs to be equivalence? Blizzard never said they wanted it to be an ATTACK that fits the theme of the tree, just an ABILITY that does. Most of them are attacks because we're talking about dps trees here, the vast majority of our abilities as dps ARE attacks. Besides, by giving the pet a stun it's teaching new players that they should be USING their pet as a tool, not just a dot that you can ignore while you plink away at your target.
Ok so now you're basically saying that it's too good. Good enough that you think all hunters should have it, because it helps our pets tank. In other words, admitting that it makes our pets stronger, which IS THE THEME OF THE BM TREE. So which is it? Is it too good or not good enough? By the way, it's not just for tanking. Yes, it helps a pet hold threat, but it's put to much better use as a reactionary ability, to maintain control of a situation.
Ultimately you have to consider Blizzard's goal. They said "we want to give you an ability that makes you FEEL like your chosen spec, right off the bat." Intimidation makes you feel like a master of beasts. Your pet can do something that no one else's can. In what way is this not achieving the stated goal?