The last time we heard anything about the Sunfury was that they had indeed, returned to Quel'Thalas but they were providing aid to the Farstriders.
Also - I believe the Blood Elf Warrior race/class combo was part of those returned Sunfury, which would tie in to the canon lore of providing aid to the Silvermoon Farstriders.
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Ok, but where, except the one, Aeda Brightdawn. Where else have we seen, prior and after that, did we see Silvermoon Warlocks working with Lady Liadrin's Blood Knights?
I mean, the Arathi Highlands was a Magister (Mage) and Blood Knight effort.
I mean, honestly - do you think me of all people, would be saying this is the Warlocks were a big thing in Quel'Thalas? No I wouldn't, but I have to face the harsh truths, no matter what Blood Elf Warlocks look like and I admit, they do look really cool - especially with green fire, but we have to face the facts. The Warlocks are a tiny olive branch, to the Magisters - the Mages of Quel'Thalas.