I don't understand how he could touch Mesaana or cancel out weaves she has tied off or maintained, while not being able to affect the net of Compulsion set in Elza's mind.

Also, I was disgusted by what RJ had happen to Moghedien and Mesaana. I'm hoping the same punishment was visited on Moridin, Balthamel and Aginor - their failures were all more spectacular, and bullying the weakest of the female Forsaken lowered the scope of the evil in the series, and it seems to me that this is a blow that is worse than the breaking of Semirhage in terms of tarnishing the overall sense of risk in the series.