Hey, i'm just saying its not entirely outside the realm of possibility, and I think it's pretty obvious that this whole thread is about speculation and tinhatting. We already had a traditionally alliance race coss over the the horde once: the high elves as blood elves. So it happened once, it can happen again.
Above all, I just find the idea pf a pact with the "devil" and the desire to return "home" interesting plot ideas.
And Akama joining horde (for whatever reason imaginable) doesn't retroactively affects BT. Why would it? it's the past.
Indeed, in a Q&A blizzard explained it:
"The situation regarding blood elf eyes is, in fact, extremely similar to that of the green skin of orcs: just being around heavy use of fel magic turned the eyes of the blood elves green. You could be the most pious of priests or most outdoorsy of Farstriders, chances are, if you were a high elf in Quel'Thalas or Outland following the Third War, you were around fel energies, and your eyes would turn green. Like the orcs' skin color, such an effect would take a very long time to wear off. Fel magic works a bit like radiation in this sense; it permeates the area and seeps into anything in the vicinity. Anything near a source of fel magic shows signs of slight corruption, it just so happens that high elves and orcs manifest it in a very visual way."
In a behind the scenes video they reveal that Silvermoon city, and pretty much all thalasian architecture was held together by magic (pretty much the reason why everything floats) with the lost of the Sunwell, the buildings fell apart. Now the reconstructed areas are powered by demonic energy (starts from 4:35). As it is, Quel'thalas was
dripping with fel energies; thus all blood elves got a case of the fel eyes. Basically its radiation.
Since the RPG's are not considered canon; that's not a valid source. We just don't know the time tables for physical alterations under fel exposure.