Board Thread:Speculation House/@comment-67.171.134.135-20150521032555/@comment-226878-20150710040550

You're obviously better qualified to be in a team environment than RWBY has proven to be. As I said, it may be counterintuitive to think that they didn't immediately take the opportunity to learn the extent of their abilities, but that's RWBY for you.

But out-of-universe, I bet that Neptune and/or Sun were originally supposed to be there for the latter half of the battle and that the exposition was meant for them (because they wouldn't know Yang's ability). But somewhere along the way, they decided to excise their role, probably because it was more or less nonexistent anyway.