Little things I wondered about:
1. Instead of :
/use !Aspect of the Hawk
perhaps this :
/castsequence reset=3 !Aspect of the Hawk, null
I hated having to hear the sound of aspect change each time I used any shot. This change helped somewhat.
It is, in working, not superior to yours, just a bit less annoying to listen to, for some people. :)
2. Putting Healthstone in macro with Deterrence perhaps (for BGs).
3. Your #showtooltip texts are mostly incorrect. While it may work for you, those copy/pasting these macros might find it very confusing.
4. More efficient to use Dash along with /petmoveto to eat traps.
Dash should also be used with /petattack to clear Grounding, if you're in the habit of using pets to do so.
5. I love using addon Transqshotmonitor. Shows the buff dispelled when you use Tranq shot in big letters. :P Definitely useful for new hunters.
6. Perhaps you could also add little tips on gameplay. Like, use tranq shot to dispel basic buffs early on so that when a pally uses wings you can get it off immediately with 1 tranq shot. Or to mix trapping with bad manners and scatter shot so that opponents wouldn't be able to predict incoming traps so easily. Stuff like that. :)
7. In talents, you could take off 1 point from Termination and put into Rapid Killing so you get 50 focus from Rapid Recuperation whenever you kill an opponent. Not that useful in arena, but excellent in BGs.
7. Finally, I believe no MM Cata guide is complete without mentioning Tosan (for arena) and Zumio (for BGs, 1v1). :D
The above are just my simple suggestions. All in all, great guide. I would have loved to read such a guide when I was trying to improve in my hunter. Thank you. :)