why is the cast of the Scions so...elvish now.

[Canadane]

I hope we get a whole new cast of characters. The Scions have disbanded and they need to play less of a role as the story moves forward. That's not to say they can't make appearances but New should be New in my view.

They were not disbanded, they just need to make it look like they are disbanded.
Y'shotla was rather frank about that.