I don't have the time to update everything, so I thought I would break out each area of the site to a separate subdomain and update the pages to hopefully meet the new QS. Is this going to work? Or are subdomains considered part of the site and will get the same QS of the parent site that the subdomain is based on? I certainly don't want to have to get new domains just to test out my revised sites. I am hoping that subdomains will suffice.
Anyone?
If you are not confident that you've 'cleaned up' effectively, that might be sensible; the unclean bits will not damage the clean bits.
But having a bunch of sites means multiple marketing, diluted links, difficult getting into directories, reader confusion ... not a 'first choice' solution.
Google itself told me to start with a new domain to speed up the process. Since a new domain has a fresh record. And from what you told me, a subdomain should operate the same way...I.E. not penalized by the main domain. Is that correct?
If your problems have related to linking in any way shape or form, then there is always a chance that your main domain is in a 'bad neighborhood' - any site interlinking is at risk of being infected and penalized in the same way.
If Google are suggesting moving the content to a new domain, then it's pretty likely that links are all or part of the problem. A new domain may be a better solution than a subdomain - which may confuse visitors in the absence of the main domain (you don't want constant emails saying "Ere, where's the main site, mate?")
Good Luck.
One plan I had was to have a content rich landing page with no affiliate links, but to link to pages that had the affiate links (in php). And to include the about us, contact us, privacy links to the main page. The reason for wanting to subdomain was to test this idea to see if it flys, on a small part of the site, then roll it out if it does. You see there is a possibility that conversion could be much lower if I try and please google. So want to test this out too.
But I agree that affilaite sites need to have as much extra, unique content as possible; you only chanv=ce of any success is to rise above the other 5000 sites in terms of quality - and SEs define quality very largely in terms of unique content.
So to that extent, go for it. As for the rest ... I dunno :)