Sorry, but nearly all of the deaths my toons in Vashj'ir were due to not understanding the zone (there's up and down to deal with too!) and accidentally overpulling as a result. Once I got used to the zone and how it works (especially once one toon finally made it to the end), it was a breeze and I've taken all my toons thus far through it.

Does that mean it's easier than Hyjal? No. Working in 3 axes is always more difficult than 2 (or 2.3 given terrain?). Still, that doesn't mean it was overtly difficult, and honestly I now prefer it over finding a mob in a cave crowded by those who are scared of Vashj'ir.

Also, quest rewards only 2 or 3 item choices per quest. Thus some get geared sooner than others. When I was on my shammy I kept seeing all this amazing hunter gear and was getting nothing towards the end. I hopped on my hunter and soon realized that most of the earlier gear was for shammies, so i went longer for the good stuff for my hunter. By the end of the zone for both, both were fairly evenly geared.