It is often really annoying that Compose Message doe not auto-wrap for me, when I edit something that I've written (which is MOST of the emails I write!), and I have to force it to wrap each line. Surely this wouldn't be TOO hard to implement?
If it would, then perhaps you could provide a pop-up menu (or similar) that allowed the user to request that the paragraph (or entire email) was re-wrapped? That should be easy to implement, and it would still be much better than the current situation.
I believe that I added this feature request...