Sorry for the delay in responding, I just wanted to drop a note to say that your explanation definitely makes sense. Lancelot doesn't strike me as the type who would know everyone and everything, but it would be wonderful to see him around more, although I understand the keeping up with current, active CR. I hope that a canon review will help with Emma, too.
And I wish I could offer anything for Yona, but all I can really say, after having seen her interact with her castmates, is that she really is amazing. I think it's all the clearer seeing her interact with her dragons that you definitely understand her character.