They told arguably the biggest story they ever have and it had no consequences beyond how it affects Anakin's psychology, and "chosen one" meaning this makes his actions even more inexplicable, he knew the dark side was dominant, and what he had to do as chosen one was wipe out the Sith, and he didn't do it for 20-some years.
I think it does help explain his actions. When he was darksided, he said he wanted to use his powers to end the Clone Wars. If the situation with the war gets even worse over the next 2 1/2 seasons, then this idea will manifest itself again, regardless of the amnesia, because it's not a product of the Dark Side, but rather a product of how Anakin thinks. The purpose of the future visions was foreshadowing for the benefit of the audience, so we know what's coming even if Anakin doesn't.
It's interesting that the Dark Side doesn't necessarily require selfishness - Anakin's instinct was still to carry out what he saw was his duty. If as Vader he's still carrying out what he sees as his duty, then that's a consistent through-line for the character that allows Anakin and Vader to be seen as the same character, at the core. The total disconnect between PT Anakin and Vader is yet another problem that TCW has now resolved. They just keep knockin' them down!
The clever thing here is that the taoist philosophy underpinning
Star Wars is now at the center of the story. Anakin knows he needs to "balance the Force." He has a vague idea that this involves controlling both Dark and Light Sides, that he alone is powerful enough to do so, and therefore the rules the Jedi have constructed for themselves
don't apply to him.
This isn't arrogance or delusion like it appeared in the PT. It's the inescapable conclusion of what he's experienced. Not only is it okay for him to dabble in the Dark Side, he has the
obligation to do so, for everyone's sakes.
The Jedi are so mired in their incomplete and flawed understanding of the Force - with a goal of totally wiping out the Dark Side, rather than keeping it in balance with the Light - that they might not even understand what Anakin needs to do. If they try to stop him, he has to fight them, regardless of the cost. The whole universe depends on it.
What the arc reveals is that Anakin wasn't motivated by fear, hate, etc but by a sense of duty. That
is consistent with his personality as he's been depicted. I think story is basically the Icarus myth - a mortal given too much power who is destroyed by it, without having to be a "bad guy."
That's a big change from the original depiction of him as a psychologically broken child-man who is so driven by his fears that he's helpless pawn in the story. It places
Star Wars back firmly in the realm of myth, which is where it belongs. And it is a far, far,
far better story! It's a grand mythic tragedy about a good and noble man who struggles heroically to do what is right, and finally succeeds in the end, instead of a stupid story about a disgusting whiny idiot who gets what he deserves.
But since "wiping out the Sith" doesn't balance the Force (unless he also wipes out the Jedi), then ROTJ no longer makes sense. Luke is still around and presumably goes on to re-establish the Jedi, which just fraks things up all over again. Maybe TCW should just keep rolling on, through ROTS, through the 20 year interval to ANH, and keep going until they can revise ROTJ so that Anakin really does fulfill his destiny in that story, or it turns out the baton needs to be handed off to Luke and they keep going with the story even after that. I'm game for that! The only part of the whole saga they should keep pretty much as-is are ANH and ESB.
Filoni said in his commentary on Overlords he actually wasn't in the room when Lucas was pitching these episodes.
Well the guy does need to keep on the boss' good side.

But for Filoni to be making up stuff that fills in between the blanks of the existing story so perfectly would require writing skill of supernatural proportions. If this was the story Lucas intended all along, it's really a shame that he didn't succeed with the PT, because it could have been magnificent! At least he's making up for it now.
As for Obi-wan telling the council, he does say Anakin is the chosen one, Mace admits he is right, but Yoda is concerned they've misinterpreted the prophecy.
I really hope they depict Obi-Wan, Anakin and Ahsoka delivering their report to the Jedi Council and show us the reaction because there isn't much room for quibbling now. The Jedi Council definitely should understand that Anakin is the Chosen One, and the prophecy means balancing the Force, not wiping out the Sith. The Jedi need to understand that their assumptions have now been upended.
The problem here is, Yoda et al are not so close-minded and unimaginative that they would reject these ideas out of hand, yet if they don't, then the story really doesn't work. Anakin has to be the only guy who understands what he must do, despite Jedi opposition. He no longer needs to be depicted as a dolt, but now the doltishness must fall on the Jedi Council, which is no better of a "solution." Not at all sure how they plan to finesse that.
Because his desire to do good made him crave power, and the craving for power is the path to the dark side.
Yeah, that's exactly it. That's the solution to the problem of how to get a good character to do bad things without making him stupid or insane. It seems so
obvious now!

The ancient Greeks were doing this story millenia ago!
For me it was never the reasons behind Anakin's turn...it was always the portrayal and execution of it.
There's a way to make the original PT story work - a psychologically damaged guy who lashes out at the world because he can't take the stresses imposed on him - but it's just not
Star Wars, which should be grounded in mythology, not psychology. The TCW story feels more true to
Star Wars to me.
And there's the additional problem that the psychological story was so bungled anyway. We should feel sympathy for the guy, but he was portrayed so doltishly that I felt nothing but contempt. For starters, they needed to hire a more charismatic and likable actor, who could pull it off - along the lines of Michael C. Hall in
Dexter, who makes even a serial killer sympathetic. It's definitely the type of role that must be very carefully cast.
Here's something I'm curious about: did Mortis take place only in the characters' minds, on some kind of astral plane (a real experience, but in which only their minds and not their bodies participated)? Or did they really land on a planet that existed outside our timestream, and their ship was spat back out of the diamond-thingy and ended up exactly where they originally were, with apparently no passage of time?
Because if it was the former, what was all that business about the Son needing the ship to escape? If it was astral-plane stuff, there was nowhere for him to go! Was that metaphorical, and he was trying to "escape" via Anakin's mind?
And since the Force has been revealed to have a will, could it be that the Force was using Mortis to communicate to Anakin what it wanted him to do, in the only way it knew how, by creating three characters who are manifestations of itself, and having them enact a drama that convinces Anakin of his duty and demonstrates what he must do when he returns to his own reality?