Several of the switches in my house have the load wired in before the switches. This is not supported by the GE switches with add-on. Is there a zwave smart switch that does support that arrangement?
By “load wired in before the switches” do you mean power to the load with no line and neutral in the first switch box? i.e. a classic non-neutral installation?
If so, an Inovelli dimmer (but not a switch) will support that. There are a couple ways those can be wired, so the level of wiring complexity depends upon the wiring scheme.