1) I can see no exploit in this post (just a theory and no theory on the exploit section)
2) Vashj'ir giant orb and fishs are reachable without dying using various methods, there are atleast 3 threads on the exploration section about this. One by me few months/years ago.
3) You can't open the puzzle box, it is not supposed to be opened, it's not a box. It's a vanity item and there is no way it will open in a place blizzard don't want you to go (after fatigue zone).
However as i'm pretty close to obtain it, i'll this try for you out of curiosity.
My thread on official french forums (from 2010) : http://eu.battle.net/wow/fr/forum/topic/1266917141
If anyone wants more info on this..
This thread should be moved/closed/reworked or something..