She also got control over the Kin by getting them to remain in Andor, which gives her channelers unbound by oaths that she can use in war. She now has cannons, thanks to Mat delivering them to her on a silver platter. She has weapons that no other country has and could conquer any nation she pleases. She has the backing of the White Tower to do it - if Egwene decides she "wants" a nation that is led by someone who won't bow to her, she could turn a blind eye while Elayne goes in and takes over. The potential for empire building - in the name of the WT - is all too glaring at this point, especially given Egwene's desire to control the entire world since that's what she thinks Aes Sedai should do. Whomever she can't manipulate under her personal control can be conquered by the nation of Andor, who just happens to be led by a queen who is sworn to obey Egwene. I've always thought Elayne should die, for varying reasons...now I'm even firmer about that position, but this time it's to keep the world from being forced into an Egwene-run WT tyranny.