A rather quick thought on Egwene, just before the Dragon's Peace meeting, she mentions that she has a headache that wasn't as bad as when Halima was treating her.   I've been wondering if that didn't suggest that she might have still been suffering the results of Halima's tampering with her or even some additional Shadow tampering like we saw with the great captains.  

I agree, Halima's "treatment" must have had something to do with her attitude in opposing Rand. It's hard to understand what Halima was doing otherwise. Although I don't know if compulsion can survive the compulsor's death.