And if she goes bad, then what? Let us stipulate that Egwene is good and nice and will never ever abuse her power again, and that she will use her influence and authority with justice and benevolence. Let us stipulate this about Elayne as well. Then they die. In case Aviendha's experience in Rhuidean has not demonstrated this to you, there is no guarantee that people in power will have capable or benevolent successors. What do you have then? This massive superpower nation or White Tower, in the hands of the all-too typical d-bag individual of the power-seeking variety who will be a tyrant. My biggest complaint about Egwene as Amyrlin is not that she won't help Rand enough but that she has always sought a growth of the influence of the Tower. The consolidation of power is never something to be applauded.