conspiracy:
Khadgar is actually Sargeras watching us extremely closely and having us kill disobeying generals in his army so the rest of the Legion doesn't blame him specifically for it and turn on him. As you see with KJ, they kind of vaguely have a free will.
I mean think about it we've constantly been feeding Khadgar endless amounts of supplies that ultimately he uses to open up something that has to do with the Legion, like we're doing gather quests for Sargeras himself.
Plus Khadgar is old as all FUCK via being cursed and he sucks shit at magic, you can not convince me that he can keep his magic going to keep himself young when Aegynn herself, the god damn guardian, couldn't even continue to keep it up. Why did he suddenly become young for a completely unexplained reason? Why does he for some unexplained reason know exactly what Guldans motives are for the last 2 expansions while the people working with Guldan didn't even know?
It's the fucking Sargeras government, man. They're putting fel in the water supplies and turning the fucking murlocs GAY
WAKE UP