Really? Ever finished it as a blood elf? Liadrin seems to wield the blade canonically.
http://wow.gamepedia.com/Quest:The_P...39;Delar#Horde
For blood elf players
Upon throwing in the sword on the southeast side of the Sunwell:
Sunwell Honor Guard says: Can that really be Quel'Delar?
Lor'themar Theron says: We shall see.
Grand Magister Rommath says: Look at it, Lor'themar. It is certainly Quel'Delar.
Lor'themar Theron says: It is indeed Quel'Delar. I had not thought I'd live to see the day when Thalorien Dawnseeker's legendary sword would be restored to us.
Lor'themar Theron says: You are a hero and an inspiration to the sin'dorei, <name>, a symbol of our endurance in the face of tragedy and treachery.
Grand Magister Rommath says: The regent speaks truly, <name>. Thalorien's sacrifice could not prevent the fall of this very Sunwell.
Grand Magister Rommath says: When you found the sword, it was broken and abandoned, much like Silvermoon after Kael'thas's betrayal.
Grand Magister Rommath says: Let Quel'Delar be a sign that we will never give up, that we will face any enemy without fear.
Captain Auric Sunchaser says: Quel'Delar is not held in high esteem by the sin'dorei alone.
It holds a place in the heart of all children of Silvermoon.
Captain Auric Sunchaser says: This blade has been returned to us for a reason, my lords. Now is the time to rally behind the bearer of Quel'Delar and avenge the destruction of Silvermoon and the Sunwell.
Grand Magister Rommath says: Reclaim the sword, <name>, and bear it through the portal to Dalaran. Archmage Aethas Sunreaver will be waiting to congratulate you.
Wrong again
http://eu.battle.net/wow/en/forum/topic/5208785474
How did the blood elven fel eye glint become so widespread? The Warcraft Encyclopedia suggests that Rommath
only taught the blood elves of Azeroth about how to siphon arcane magic,
as most of the populace would likely be "horrified" if they knew the true extent of Kael's dealings with Illidan.
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.