Rhonin and Thrall are known Mary Sue's, and Anduin is dangerously coming close to becoming one aswell. Currently he has been way too unrealistic, he should've been dead the moment he went into Jade Forest alone. He's like one of those kids from E rated Disney movies, where he can be the savior of the world fighting against a full grown up, military trained army.
Anduin has been spoiled up till Cata, and look how he suddenly rises so quick in power during MoP. And been given so much screen time. This is how Thrall suffered in Cata aswell. I wouldn't be suprised if Anduin ends up killing Sargeras with Thrall...