[[WMG: Legacy of the Force was the result of a huge Xanatos Gambit by Abeloth.]]
The Jacen plot is not a red herring. Abeloth ''was'' the main Chessmaster behind his fall from grace...she just didn't do it directly. Somehow she managed to get Lumiya under her control; Lumiya was flying under the Alliance's radar for quite a while, so it's not inconceivable that she could have ended up in the Maw somehow. Then, she sent Lumiya to turn Jacen to the Dark Side; she might have even fabricated the "Tassels" which were telling Jacen to sacrifice someone he loved. As we all know, this resulted in the death of two of Luke's biggest love interests, Mara and Lumiya. Once that was done, all she had to do was kill Akanah, and Abeloth would have Luke all to herself.

So...yeah. That whole book series happened because some EldritchAbomination got lonely and jealous. Still somewhat lame, but it makes sense.

[[WMG: Daala has been driven crazy by Force Psychosis.]]
She's not a Jedi, but she did spend a lot of time in the Maw. And since she wasn't a Jedi, she wouldn't be able to defend herself telepathically, like Ben just barely managed to be able to do. It would certainly explain why she seems to be so needlessly paranoid at times...
* Worth noting that the Force connects ''all'' living things[[note]] except Yuuzhan Vong put in Time Out by their homeworld[[/note]], not just Jedi. So, technically speaking, anything alive[[note]] other than a Yuuzhan Vong being punished[[/note]] would be vulnerable to Force Psychosis.

[[WMG: Jaina, after marrying Jag, will leave the Jedi Order and found the [[StarWarsLegacy Imperial Knights]]]]
Seeing how the story's going right now, it seems like the most legitimate explanation for the Force-sensitive Fel Dynasty and its Force-wielding PraetorianGuard.
** Actually, spoilers from ''Ascension'' say that, to atone for what she did, Tahiri will become Fel's bodyguard.
** Tentatively {{Jossed}}: [[spoiler: Jagged Fel relinquishes control of the Empire to Vitor Reige and marries Jaina. Jaina becomes a Jedi Master and a member of the Jedi High Council.]]

[[WMG: The dark figure Jacen saw ruling the galaxy in his vision was him]]
He saw a vision of someone ruling the galaxy and foolishly assumed he could prevent it by... ruling the galaxy. Thus turning it into a case of [[SelfFulfillingProphecy Self-Fulfilling Prophecy]]. When Luke and Ben see Allana ruling more benevolently, it's not because Jacen's ''changed'' anything- they're just seeing a later future than he did.
* Jossed. [[spoiler:The dark man is a mysterious Sith that acts as an unexpected ally in Luke's fight against Abeloth over the Lake of Apparations. Jacen reveals that this man is the dark man in his vision, and his true fear was that Allena stood by the dark man's side in this vision.]]