I really enjoyed the friendship between Prophet Velen and Illidan Stormrage during Legion. In their mutual desire to finally see the Legion taken down, Velen got to know someone he trusted with serious tasks who also challenged his long-held worldview about the part that fate plays in ones future besides taking action. With how many thousands of years he had with that as well as seeing into different timelines, this was huge for him and even managed to develop his character some, as seen in the cinematic after the defeat of Argus. Illidan asks "Did you see this fate, Prophet?" and Velen answers "Our survival...was
never in fate's hands." They share a smile before they part ways.
Before this, Velen may have even saved Illidans life after he rejected Xera's 'gift' and blasted her to smithereens. Right after Turalyon's failed attack on Illidan when he caught the sword with his hand, for awhile he was still on the ground before he could get up. Velen didn't know for certain that any of the soldiers surrounding that circular floor wouldn't also step forward with their weapons to try and finish the job.
Really consider it. Velen has a huge connection with those guys, sure--but they've also spent thousands of years with xera and Turalyon both. Emotions would have been running high, and any one of them could have done so. If they had, others would have been likely to join in as well. Even after Velen stepped into the middle, immediately going into an impromptu speech and taking control of the space, there would have been a couple of tense moments where all of them evaluated if they wanted to do it...
And even though it was an understated moment, and I may be overthinking it a little bit, I think that was part of the real reason why he asked the player to start gathering up the peices of Xera righit then. Lets ask this accomplished fighter to linger here. By the time we're done putting the glowing chunks in the forge, Illidan is back on his feet and the moment has passed.
It was kind of subtle, but important.
It was kind of the grown-up version of the friendship between Anduin and Wrathion, in a way