I don't look at the situation exactly the same way as you. Sure, Egwene allowed Siuan's lie to carry on, and that DID create strife between Ajahs. Egwene is culpable there. But the point Jordan was trying to make with Egwene in the Tower is that by being forced-demoted to Novice, and having to hold on to her title with none of the attendant benefits, Egwene was getting a new look at the idea of power and its implications. In tGS, we have a Siuan PoV that read somewhat like Jordan to me where she thinks about how she herself was not above blame, and that the cracks Elaida widened to fissures were there because of the way Siuan herself played politics as Amyrlin.

I was waiting for a similar reflection from Egwene. I was expecting that as she realized her true goal in the Tower couldn't be to widen the divisions Elaida created, she would also realize the failure on her part in the past. I was hoping we'd see her renounce on screen that kind of politicking. I mean, her later insistance that the Reds be saved is laudable, and at that point at least, I'd have expected her to think about the lie against the Reds. She wears red clothes to symbolize the need for unity, but doesn't think about how her own actions caused disunity? Not very Egwene-like. A definite failure on Sanderson's part.