do not forget that maybe (not saying is a fact) they have some suspiscions about some of the scions to be involved in some kind of double play.

Let not forget that we still have an unknown pawn in the game or rather that we are not too sure what he is doing, aka Urianger, so maybe Papa and Yda have chosen to remain in the shadows for that reason until they find out exactly what truely happened and who they can or cannot trust among their own kind.

I am with Airget in this though, I do believe they willingly and purposedly remain hidden to continue investigating.

I wish we had some more insight on Urianger's true role in all this, what he got promised and what his role is exactly and Relationship with the dark side (so to speak)

As for Papa & Yda, I do believe that we might have more info in this patch on what they intent to do.