This is a thought I had today when a guildie of mine asked for help on a quest in SMV and after I searched and saw the idea with the Human Transformation in Durnholde. He had an item, Enchanted Illidari Tabard. Now my theory is to go to the Eclipsion Fields where the tabard can be used, then cast Shadowform, cheetah form possibly, or maybe even use a Deviant Delight. Then when you die, it will dispell your second transformation instead of the Blood Elf Effect, thus allowing you to be a BE outside of the Fields.
NOTE: I have NOT been able to test this due to me not being far enough into the Quest Line, so if you feel up to it, please try to test this out and post here.
Thanks!