Currently macros (scenes) are very limited. but I'm hopeful these will grow.
Originally the WM100 was to have more onboard memory then the CM15 so such macros should be possible if the memory Onboard is what was originally designed.
I've asked for specs on the modules when I asked about the MCU.
I still use motion detectors but these are the security type as I never had much luck with the others.
Many use door window sensors for detecting all sorts of stuff.
I had PCC configured so all kinds of stuff could be triggered by any X10 RF signal seen.
A home made water detector is one thing I setup using these.