Leaving comments may be a little awkward for a while. I've had TinyMCE on since I started this site, but as a writer I've stopped using it. I can imagine it being awkward for users who aren't used to it and a lot of the features never seemed to work. It was never number one on my priority since readers can always leave basic messages - just don't try to do anything complicated.....yet.
Easy-to-use
I value easy-to-use above lots of functionality in this case. So I'm on the search for something better. I'll post back when I've installed something.
Suggestions
If you've any suggestions for a Drupal WYSIWYG editor, then please let me know - although that does mean you'll have to tackle the comment form :-)