I'm not some people though. Demon Hunters and a Tinker class have nothing to do with what I'm saying about the actual Hunter class.
And quite often the simple things work the best. Shapeshifting the Hunter is hardly a game breaker. It's not as big of a deal as you might think.
A tank spec might work. The Hunter shapeshifting to do so was just a quick thought. I hardly put all my brain power behind it >_>
You could just expand the pet bar and give it new options for tanking if that's all your after.