Scion presence is something I am mixed on, I adore them, but I acknowledge that having this gaggle of absurdly powerful and competent warriors around at all times makes writing much more complicated, it's easy to write around WoL, they are ultimately one person who can only do so much, having 8 other not-quite-WoL-level-but-pretty-dang-close people hanging around makes the whole "Why didn't they just solve everything" thing much more difficult to justify.
