As it is, she just has too much on her plate to hash out little details like that when she needs to get over the whole sordid mess with Tarmon Gaidon looming so close. It's probably for the best unity-wise (if in no other respect) if everything is buried, such as who stood for which outrageous measure or went along with whose absentee/sham trial and who spread misinformation about whom. For Egwene's PoV, there is no difference between the Salidar rebels who were her first major stepping stone to power, and the Tower loyalists who made her Amyrlin in truth. Both factions are equally her "daughters" who must be protected and aggrandized to the outside world, and kept in their place and properly subordinate to her on internal White Tower issues. Siuan lied TO one faction, ABOUT the other faction. In Egwene's mind, since she was frank with Egwene, the offenses probably cancel each other out.