Originally Posted by
TheLoadbearer
I know, but Quel'thalas wasn't exactly the biggest supporter of the Alliance.
Sure, being the only human to serve Quel'thalas/Lordaeron, especially as a Ranger-Lord, is neat and all, but I can't imagine Sylvanas would care enough about the Alliance-serving deeds implied by Bolvar/Varian in that quest to promote him to Ranger-Lord.
My guess would be that he joined the Farstriders, was super skilled, and helped them out a lot against the Amani, which Sylvanas would very much care about. That would be a surefire way to earn her trust and prove his loyalty both to her and to Quel'thalas, by serving decisively against their most hated enemy.
Not saying service against the orcs during the 2nd War couldn't have had something to do with it, but I doubt Sylvanas would care enough about him killing orcs to promote him for that. Sylvanas was mad at the orcs for killing her family members, but her hatred didn't last forever, as she now works with them. Conversely, she still hates the Amani, or at least she did in WC3. I believe there's a mission with a side-quest where she comes across forest trolls and says "Forest trolls! I hate them even more than those cursed dreadlords. Slaughter them all!" And from her perspective, she'd likely hold the dreadlords just as responsible for Quel'thalas' destruction as she does Arthas. So that's pretty intense hatred.
It's like the Alleria argument. Alleria isn't some paragon of the Alliance, despite Stormwind building a statue of her. She doesn't like humans in general, except those she's formed personal bonds with. And neither is Sylvanas.
I'm just trying to think of things he'd have done specifically for Lordaeron that would merit Bolvar/Varian's praise for him.