When I proposed changing the recaptcha theme in both Prosilver and Subsilver it was motivated by an actual usability issue I saw in the support forums. Users who were using either of the two default styles and recaptcha as their CAPTCHA plugin were forced to edit the default styles themselves and they should not have to. That was the value gained from changing the style templates. There is almost zero value to be gained by changing the display in the ACP (afaik nobody has ever been confused by, asked how to change or needed the ACP recaptcha theme changed from its default,) in fact it would no longer be representative of the default recaptcha, since the default is "Red". Because recaptcha themes are style dependent the ACP can never accurately portray what they will look like for all cases (boards) or even a majority of cases and when you don't have a solution for the majority of cases you don't have a solution at all. The best currently available option was to leave the ACP alone, as the changes to the two packaged styles really had no connection with how and why the recaptcha is displayed there. Which is why my patch specifically left it untouched. Contrary to popular belief here, being able to see the forest for the trees is actually something to aspire to.
Rich's comment that "In 3.0.8-RC1 the styling of the reCaptcha changed, this should be reflected as well within the ACP." shows he did not understand my motivation and the value gained, which was completely style based, not board based. You want to make a frivolous cosmetic change in the ACP that benefits no one really, that is fine just don't try to tie the change to my patch as justification when they are completely unrelated.