I'm starting up a new site and am considering the options for the domain name. Like the title says, I have a 2-year-old domain in the niche. The thing is with this domain that I have an autoblog on a subdomain, with the root domain redirected to the subdomain. The subdomain is indexed and even getting some traffic. Not a lot of traffic, as I'm finding Google kinda seems to top the traffic to these kinds of sites. Not sure if we could talk about a penalty here. The root domain even has some 20+ DA in Moz (seemingly from internal backlinking, because I built no backlinks to this site, trying to rank it on its own). That positive DA plus age is the reason I'm thinking to use this domain over a brand new one. But the question is, would it be a healthy decision to put the new site on that domain? I'm also thinking to lose the subdomain or redirect it to the root? Wouldn't the new site incur any sort of "strange" penalty like a traffic limitation or whatever? Your thoughts on this?