After mulling a bit more, I'll re-state my original wish succinctly:
jps - It would be nice to add support for *.hostname.sublime-settings, where those settings only apply on the machine that has a matching hostname. These settings files would work in the pre-existing hierarchy that Sublime already supports (e.g. Default.sublime-settings, FileType.sublime-settings, User/Default.sublime-settings, etc), and applied last in the chain.
sublimator - I'm not modifying any arrays from within loops, so I'm not sure what you're referring to. I'm not worried about hotloading support - the plugin does what I need now that I've pulled the settings out to a config file. Feel free to fork
Also, for those following along at home, I've split the plugins out - the repo previously listed is now at github.com/johnburnett/sublime-footools , and the per_host_settings.py plugin reads from a file named Packages/User/per_host_yourhostname.sublime-settings