I assume by “Raspberry Z-Wave module” you mean the RaZberry, and I couldn’t agree more. I tried to get that thing going with another home automation package and gave up after a few hours of fucking with it.

That said, these days I’m using Home Assistant on a RPi with a Nortek z-wave/zigbee combo radio USB interface and I couldn’t be happier. If you’ve never used HA it’s worth trying out; used to require a lot of scripting but now it’s a beautiful and polished system that has all the tweakability a nerd wants with a nice high-WAF GUI. They have a plugin that does exactly what you’re doing and makes a virtual alarm system out of existing sensors.

I also agree block connections and use a VPN to access it, I do the same thing.