Interesting idea - adding whitelisted domains to bypass the VPN. We will investigate this. Currently we recommend running 2 routers simultaneously (which do not interfere because of automatic channel switching) with the VPN chained after the normal one. This allows you to choose when to use VPN. Basically the Easy VPN Router is designed to be super easy so that non-technical people don't mess anything up. Building one yourself is tricky, especially to cover edge cases like the VPN dropping, the internet going in and out, etc.