Awesome mod! I'm enjoying it a lot.
I have somewhat of a suggestion, the motion sensor seems to activate when there's an entity in front of it, instead of detecting movement, which is what I first thought when I readed "Motion Sensor". So, my suggestion would be changing its name to "Entity Detector" or "Entity Sensor" to better communicate its use.
Just a thought that I had, as I said, I really love the mod, keep up the good work!