Ah neat, looking forward to looking at the release notes.
I was really close to pulling the trigger on switching all of my managed sites to a single vSZ instance in the cloud, but vSZ 5.2.0 being affected by the WPA2 slowdown issue was the showstopper issue.
I'm also hoping 5.2.1 brings more 11ax features like TxBf on the R730, Mesh on 11ax, etc.