I am in the process of splitting off a large site. Large sections of the site have grown out of hand with content, and diluting the more productive areas of the site.
There is a lot of potential for these other areas, and splitting these sections to separate domains seems to make the most sense.
What would the best general plan for splitting this be? We will most likely need three or four different additional sites, and development time and follow up content creation will be fairly huge.
I am considering noindexing or using robots.txt for these existing sections in the meantime, is there any harm in that. Likely to be flagged by G in any way?