I used your plugin primarily for the "limit to children of" feature.
One thing that could be useful is the option to remove the post_parent attribute after the conversion. If a page is converted to a post type, the post list includes a "Parent of" label that might not be applicable for the new type, and could even confuse the user.
(I just removed the post_parent attribute with a sql query - which of course I could've just done in the first place. :P)