Seeing the water flow has been helpful, I was way over watering one zone (I had a brain fart when setting the runtime). Looking at the data for each zone most nights has shown that irregular readings are valid, e.g. a stuck valve, a drip emitter blew open (clueless how that happened), and the pressure regulator was not doing its job (which I refused to believe but a new one confirms the old was junk). I want to add a temperature and pressure sensor at some point but am spinning the control board (again), so those sensors will wait.
I have some Schmitt trigger IC's but these reed switches are just to glitchy, I think a pulse extender circuit would be needed to shape the pulse into something usable. The hall sensor signal looks perfect so I don't think a Schmitt trigger is needed.