Yes, I tried the customization you suggested but as wp-login.php doesn't use my theme it's hardly a solution to just change the logo and some fonts. My site uses the s2member login shortcode and so the login page looks this ... which is consistent with my theme (which is the Divi Extra theme).
My forgot password page with a new logo is here and you can see that the forgot password page doesn't look like my theme looks at all. You need to create a shortcode for forgot password.
Also, you have a bug in your media library popup under Login/Registration Design, see here..
My biggest complaint about s2member (other than the lack of a forgot password shortcode) concerns theme support. For example, on the login page there are, by default, section headings which render in a different font than the section contents. I preferred to not have the headings at all because they are both necessary and ugly) so I CSS'ed them out.
The golden rule for plugins should be do not usurp the theme styling at all or, if you have some reason to do so (and I can't imagine any for the majority of plugins), make sure that all of the elements have easily identifiable IDs so the styling can be easily changed.