I often have very poor luck getting responses via email so I would try to have an actual conversation with her.
I can never figure out if teachers are deliberately stonewalling, or they just space out and forget to reply, or what is going on. It's frustrating.
I'm not clear from your post if the problem with the teacher and the writing assignments are resulting from his acceleration. If so, then it might be appropriate to bring it up (if you can do it diplomatically). If there is any possibility that the problems with writing could impact how successful he is with the plan, then I would bring it up as well, so no one can accuse you of hiding anything later on. If everyone knows and is still on board, they can't complain about his writing later.
