I hear ya, David – you’re experiencing slowness on your Zen Mini and believe that it’s because of a problem with Roon. I’m a bit confused, though, since you previously concluded that your Zen Mini was the culprit.
Your Zen Mini has an Intel Pentium processor, 4GB of RAM, and a spinning boot drive. That might work for extremely small collections, but it’s going to choke on anything sizable. How large is your library?