Better multisite management - plugin to manage sites

I've realized that a lot of the websites on the network are with the default theme/content. They were never converted into real websites. Now I'm switching manually all of them to "Discourage search engines from indexing this site". I don't think there's any plugin who could help me with that, so I need to go to each website Reading Settings' to make the change. But I wanted to ask the community if there's any plugin who could make our life easier - or a list of plugins. Thank you all!