I don't see it as such. Even if their minds were still intact, getting rid of a Forsaken is a good and necessary end in itself. He didn't put them there, so their proximity to Graendal is not his problem.



Getting captured by Semirhage would be extremely unpleasant, but falling into Graendal's hands would be worse if not as painful. He would merely suffer with Semirhage, but under Graendal he would no longer exist. Even if he was still turning food into poop, for all intents and purposes he would not be himself any more. The situation RJ described answering why people are afraid of death if they are just reincarnated effectively applies to people taken by Graendal - they might go on in some sense, but the personality and mind and all the rest of that is gone.