The fish wives are fine! Either that ending did not happen or it was all a planned thing for everyone to get stuck in THEIR nets. Whatever. Those are the only 2 options.
Still in all seriousness it was a planned thing between Moiraine and Siuan IMO for too many reasons. The delusion is real
Oh I have no doubt they'll be alright, nonny! Rafe Judkins is smart enough to know that if he was going to canonize Siuanraine, we wouldn't accept its mishandling. We're gonna be fine.
Personally though I do think that conflict was real, not planned. Of course, I do love the idea of them orchestrating a fake falling out! But it just doesn't peg me as something that wins them anything.
I think Siuan is so used to her and Moiraine being in agreement about how to handle the Dragon prophecies that she truly didn't expect for Moiraine to go rogue. The way I see it, Siuan sees two things: for one, Mo has been stilled. That is agony no matter how you slice it, and she's deadset on taking as much of the Dragon burden off of Moiraine's shoulders as she can so Mo has more of a chance to heal (remember, there's been a whopping two Aes Sedai who ever managed not to kill themselves after being stilled in the Tower's known history).
Secondly, she sees that the time of the Last Battle draws near, and Moiraine has been withholding information for the past six months and also very pointedly not tried to prepare Rand at all. Siuan is the Amyrlin Seat. She's made of strategy, and that is a bad one, whether it was her lover's choice or not. I think Siuan was certain that if she made a point of taking the burden off Moiraine's shoulders, she'd be met with acquiescence---perhaps even appreciation.
Watching the episode, I took Siuan's reaction to Rand having been released to be one of complete shock. I'm sure she expected stubbornness, but not outright double-crossing. That's why she made a point of chasing after them alone, with no guard. She felt betrayed.
Then she runs in to see Moiraine channeling. I'm sure she was floored, and this is why I think the theory that she suspected Moiraine of joining the Dark to hold weight. I mean, how bizarre from her perspective. Six months of correspondence, and Rand hasn't been trained even a little, and this alleged stilling was kept from her completely until Lan tattle-taled. That's outrageous, especially since it doesn't seem like Moiraine has ever been that dishonest with her before. And now it was apparently a complete lie? It shouldn't be possible. Unless of course Moiraine made an oath that supersedes her previous ones...
Which is why she forced her to close the Waygate. Twas a test. Once Moiraine obeys, you can see just how much Siuan regretted doing it. Her eyes well up immediately, like all she wants to do is apologize. Had Lanfear not walked in that very second, I'm sure she would have.
So, we'll just have to see how Siuan feels once she hears about the events of Falme, that Ishamael is dead, and that Alanna and Verin were Mo's accomplices. Hopefully she reacts well, or at least well enough to still want to talk it out with Moiraine when she gets the chance---and I think she will. This has been the burden that's ruined their lives for 20 years. She's not just gonna let that go.
So yeah, we'll be okay. We're just gonna need some medicine, perhaps an emergency operation. 😭