One concern is that he is a gentle child who sometimes gets pushed aside by more aggressive kids. My understanding is that Waldorf believes children should always work out their own problems and is very hands-off with conflicts; in that environment he could end up getting the short end of the stick.
I wish I had any information about this - I'd request to visit a classroom to see this in action if possible. They seem to guide the kids very throughly in everything else, so I can't really picture this. I'd want to see the particular teacher who he would have and ask her to tell some example stories about this to see if it passes the sniff test with you.
What do you think about the reading? Do you think your family would be comfortable leaving it for after school 'on the low down?'
G
