I like the way the 2860 dashboard shows me everything that is connected to my LAN, but is there any way to manually enter device NAMES for certain MAC addresses? This would make it even easier to manage connection issues and spot anomalies

Thanks

Looking on my 2925 the host ID is shown, so that works for my rpi's, Win 10 machines and iPhone automatically.

You could try binging the MAC address and giving the binding a comment, that might show up, you can find that under LAN | Bind IP to MAC