Hey, I've played the 49 bracket for about 3 years now so hopefully this should be decent advice
Your hunters gear is pretty good tbh, but I'd swap out 12 agi on boots for Surefooted personally. Also, I'd consider getting some legs with Nethercleft and if possible some BoA shoulders with the 30sta/15resi patch on them, decent hp is a must with all these 5k prot warriors that seem to be running around. Obviously you need to get the helm from Meshlok like you said, and if I'm really picky, get a 8/7 ring
Looking at your rogue, same deal with shoulders, and get an 8/7 ring to replace the SM one. Also, get your mining to 300 so you can swap that 12 stam on boots for Surefooted on AB boots. I'd also reccomend getting some 15/15 of the Monkey legs and Embrace of the Lycan (Don't worry about exp, just let the booster do the stairs event whilst you sit outside, then run in and let the boss kill you). Major problem i can see is your weps/spec. Your current spec seems to be some sort of dodgy backstab/ambush spec, if so then why Shadowblade in main hand? Also, not specced for hemo or ghostly strike so a 2.70 speed wep in offhand seems stupid to me. Get Widowmaker with +7 wep damage or 20 agi for your main hand and possibly another, or the Balanced Heartseeker in offhand.
http://www.wowhead.com/?talent=fhxcoxZZcbfbhGzb
is the spec i'm currently using on my rogue, could do with abit of refining maybe but it works well.
Hope my wall of text was helpful, enjoy