Okay, so I'm sure this has been brought up before, but I can't recall reading about it, and I thought I'd see what people has to say.
I was looking into items for enhancement shaman come end-game, and it turns out there are only 3 (as I recall, but it was about that) pieces of non-tier, non-PVP epic mail gear. There's lots of gear with attack power, but little with strength (which, is, supposedly, an enhancement shamans most important stat.) This particular problem shows up particularly if you're a leatherworker (especially pre-Outlands recipes), since almost all of that mail (which is, admittedly, pretty crappy) has agility and that's about it (spirit doesn't count...what mail wearing class wants spirit?). The Outlands mail at least has attack power along with agility and stamina.
That being said, I was thinking that it would be interesting if Blizzard were to make a change to the way some stats work for shaman. Particularly, since they seem so gung-ho about enhancement shaman and hunters fighting for the same gear, why not let 1 agility = 1 ap for shaman? They would, of course, have to decrease the rate that agility converts to crit for shaman, so that when everyone began stacking agility, their crit rates would stay approximately where they are now.
Of course, they could just fix the itemization so that there was actually some mail with strength on it (would that really be that hard to do?)
Anyway, just something I was thinking about it. Feel free to comment/flame me for saying something that everyone's probably thought for ages (though I can't recall seeing a discussion on it.)