I've been a long time user of your products for both myself and my clients, with good satisfaction.
The introduction of the new WireGuard VPN standard into your devices would give big boost for their sales. It's a faster standard with much smaller code than eg. OpenVPN and thus it can run on most devices with much better performance while putting less on the CPUs.
Don't forget your old deives thou. While some of them are able to run DD-WRT, which has WireGuard built in for a while, an official firmware from your developers would be more logical.
Furthermore, some other manufacturers have introduced VPN client mode, for which there is more demand. I've found no such option on your devices. This would be another good direction of development.