How is the registry going to make that administration any easier? The registry is its own micro cosmos, doesn't matter if some setting is in an INI file somewhere on the filesystem or somewhere in the registry
Sysadmins have great tooling to deal with the registry (Group Policy, Local Group Policy for non-domain machines). The tooling for INI files isn't very good.
I don't know one sysadmin that likes how the registry does things. INI files for configuration are vastly easier to understand and edit. Use the registry for permissions and keep your tooling.