I have this exact problem. QuickVPN was why we bought the RV082 but it doesn't seem to work properly.
To start with it doesn't work like a true TCP transport. It appears to 'steal' packets from the network stack and transfers them to the LAN. This means that clients come in with the IP address allocated by their home router so my servers don't trust them. What happens when we get two clients with the same IP address (which is likely to happen given how home routers are set up) is anyone's guess.
Secondly as the OP states QuickVPN clients only have access to the local LAN. Our RV082 has a gateway to gateway tunnel to our hosted servers and a couple of static routes via relay servers and QuickVPN clients have no access to them.
If I'd realised this when I first bought the RV082 I would have returned it.