Focus Groups?

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I don't know if this is the proper forum for this, but I'm wondering if the devs ever do player focus groups. I know they send out surveys that we all fill out, but that's not player focus grouping. The paper game devs do it all the time for better or ill, so I'm wondering if these devs do, if they plan to, and if that's something we would recommend? These forums and other like it (Reddit) are strong tools for gauging response, but I'd think focus grouping could give them some in depth idea of what works vs. "filtering' things up through Brigby alone (not something I'm advocating discontinuing).