What about a(n) (optional) preview page? It would be nice, especially with the multiple formating options. It also allows most of the benefits of being able to edit posts, without being able to edit posts. I don't know how often I've screw up a quote because it didn't look like multiple lines but it was.

Is there a reason why the post box is so small and pushed to the side?

Forced fusianasan would be fine I think, if they had advanced warning.