Bernard

The launch discount is for our existing customers essentially to allow them to upgrade at a cheaper price, there isn't an exchange program or discount outside of that. 
No ETA at the moment but DumaOS 4 will be coming to the R2. I'd suggest signing up for Early Access: https://forum.netduma.com/topic/39415-introducing-early-access/ it may be more stable for you and you'd also get to try Smart QoS.

Hello,
On the Network Settings => DHCP screen I can reserve an IP for a device IF I know what is its MAC address. 🤷🏻‍♂️
Also I can't edit the device name (name or rename).

That's cruel 😂 and force common mortal to go back and forth several time from one screen to another (device manager)

I should be able to see not only existing MAC Address with the assigned name but able to see what is the actual IP of the device and reserve it as is or assign a different IP.
On the same screen I should be able to edit the device name to avoid going somewhere else while doing the device assignment.
 
Bernard

I see what you mean, displaying it's current IP address as well as adding the option to rename it from there would be handy! I'll add it to the roadmap and let the team know. Thanks Bernard.

Sometimes you'll need to clear your browser's cache after this, as the browser may have cached the page with all the old devices on it.
There isn't a way to only remove devices without static IPs as yet, though as a workaround you could configure a static IP on the device itself, rather than on the router. Then when they connect to the router they'll always have the same IP as long as it's available.