Back when I ran a recirculating drip system I used a system like what you are talking about. I always had problems with the salts in the nutrients causing buildups that would clog emitters nozzles. This at first was just one here and there but after a little while it's all of them and it's a PITA to unclog them all the time plus you have to be checking them all the time and that meant automation was out and I was in lol. Hated it so much. Plus once a dripper managed to somehow end up out of it's pot and on the floor. Didn't find it till the next day, that wasn't fun but totally my fault.
I just avoid systems that have that much granularity because it's more parts to fail. A flood and drain system has one pump thats just circulating the reservoir and one pump on a timer that floods the tray. The tray then drains back into the reservoir below. So you flood the tray say once every 4 hours when the lights are on (thats what I do with expanded clay pellets in 6 inch square pots). So unless a timer or a pump fails or the reservoir runs out of water you are good to go.
I have automated them with a solenoid valve on a float valve such that the reservoir is automatically topped off from my RO filter during the dark cycle when it's guaranteed all the water will be drained back into the reservoir from the tray. Then you can just check pH and PPM. Larger reservoirs are more stable and can be run longer. With RO water and good nutrients (I use GH Flora Trio) the pH stays really stable.