Good system administrators constantly look how to replace themselves with scripts and automation. Bad ones build job security by owning manual processes than nobody else can master.
With signing now done by some code instead of us, I (and other buildd admins) have more time and energy to work on irregular tasks - upgrading chroots, helping developers with porting problems etc. Not to mention blogging and updating ones own packages to sid..
Meanwhile, there are still some issues needing solving - $HOME isn't available on all buildds, -volatile