I think that could be very useful the ability of optimize the header section:
Disable and/or enable manually:
trackback and xmlrpc tag
And also the ability to move in the footer js and css rel tags.
In general it would be a feature that give the ability to edit and optimize, if needed, the header section. This will give more performance and fast loading for mobile devices, and a better optimization of the website from an SEO point of view.
Hope could be useful, thanks.